I don't have time to do a proper translation (not that my Japanese is nearly that good), but a few comments about this interview.
> This is an extract of the text translated to english via babelfish.
> Seems like he is saying that the announcement will be made in
> photokina at fall..
 
Sorry, It doesn't say that. When asked by the interviewer about the prospect for a new 5D at photokina, the interviewee replied that they are working hard to deliver the 5D update as soon as possible.
 
> "After the inaugurating, it was the question fish story which
> indicates the fact that directly it starts the succession type of
> full size machine in the April ─ ─ last year. Recently
> until the product appears from plan commencement, because time about
> of 1 year half is required generally, in Photokina which this year is
> the biggest event, the 5D succession type becoming announcement, to
> be strange, without being, the shank.
 
Geez, Google translation is horrid! This was a question asked by the interviewer. He says that in an interview from last April ('07), a Canon VP said that they had started on a new full size sensor model. And that since a camera generally spends about 1.5 years in development, would it not be reasonable to expect the new full size model to be released at Photokina.
 
> Because size of the expectation for the full size machine has been
> transmitted even in this, it finishes in the as much as possible good
> product. Please enjoy. In regard to picture quality and in regard to
> added value, it becomes something which progresses largely probably
> will be. "
 
This was from the answer provided by the interviewee. He says that Canon is aware of the anticipation for a new full sized model, and they will meet that anticipation as soon as possible. He also added that the new full sized model will be a significant improvement over the 5D in terms of IQ and customer value (whatever that is), and that he's looking forward to us enjoying it.
 
Key point :: He did not confirm Photokina. It could be announced on 4/22 as easily as 8/22. Also of interest, he does seem to rule out the 5D being split into a high-price and low-price model. He was asked if Canon has any intention at this time of expanding their full-frame camera lineup, and he flatly said no. The price-performance leader is in APS-C cameras, and Canon feels their balance between APS-C and full-size is okay for a range of products.
 
Honestly though, Google's Japanese translation is all but useless, If you have to resort to machine translation, I recommend using Excite's service...it's a bit more understandable.

Don't have time to spend on doing this decently, but here is some translation, some paraphrasing of the part of the interview that is relevant to this group.
Single brackets [] are gross paraphrase, double brackets [[]] are my notes.
 
********
 
Q: [5D follow on, there have been talk of two actual bodies, any truth?]
 
A: How many bodies (platforms) for [Canon] to carry is a difficult question, and since that is so then there will be no rapidly expanding the lineup. The mirror box design is different than that of the APS-C , [[etc. Added as an afterthought, no doubt to emphasize that the full size platform is really a different camera than the APS-C cameras.]]
 
Q: Be that as it may, for the class of user influenced by the 35mm film size, [...] coming in at a little lower price would be good.
 
A: [[summarily - You get what you get.]] DSLR develop times are long, and what our line should be is now a topic of discussion. We've accumulated a long history of camera operabilities, in ease of use and interoperability and functions..., and we need to spend a lot of time scrutinizing these types of issues. Lots of testing and polishing up, [ etc. ]
 
Q: April of last year, when you took over, you said that you immediately gave instructions for the full size follow on machine. Recently, in undertaking projects [you indicated] it takes about a year and a half, and this year [you mentioned] a big event at Photokina... isn't it going to be the 5D follow on?
 
A: There is a big expectation for a full size machine, and that is here being transmitted again... to the extent that is possible, to make a good product, we are finishing it up.... [and when it comes] please enjoy it.
 
Regarding image quality and added value, the progress will be on a grand scale I think...
 
Q: At the previous interview, you said you wanted to change camera usability and numerics [specs] .... how is the progress on that?
 
A: [ mechanicals, sound [[mirror]] improvements, wide variety... but on the specs not so... but we are investigating "what kind of camera?" and so forth....] [[ he sounds fairly non-committal, or better yet non-revelatory ]]
 
Q: At the previous interview you spoke of the boring middle class camera[...], the amateur sphere... [etc.]
 
A: [Camera designers face that sort of thing... we're in the middle of exploring that... to satisfy the spec demands and the cost constraints.... we make changes little by little.]
 
Q: No matter what, about the full size follow on machine, will "new pleasure" be found no later than Photokina?
 
A: Certainly, this year has only begun. There's been 1 announcement [450D]... and we won't betray the expectation for a new product.
 
 
********
 
Only two things worth noting... he wouldn't commit to a time frame before Photokina, and he thinks the changes (from the 5D) are significant.
 
Cost IMO is up in the air... the dollar value being what it is, any Japanese company ought not commit to a price until the very last minute.

It's also worth mentioning that all the cameras here - even the D300 and EOS-1Ds Mark III with their densely-packed sensors - produce high ISO results that would have been unthinkable a few years ago, giving photographers the kind of flexibility they could only dream of in the days of film. Where the D3 really impresses is at the extremes - ISO 6400 and above - at which point it really does set a new benchmark; not only for low noise, but for detail and (importantly) color accuracy. Impressive stuff.