"Also, people are still saying that the new boards are the ones with the good ICS clock generators. This is wrong! The new boards have Cypress and the old boards have ICS! "
Logic would suggest this is true. Asus needs to clear out the stock of Cypress chips so are using that on the latest P4T-E boards. Then use the ICS chips on a revision of the board to support the 1 gig RDRAM (maybe even give it a new model number).
I bought a used (think it was a display) P4T-E two months ago here in Japan for real cheap. It must have been one of the first boards out. I checked the other night and sure enough, it has the ICS chips, including the bigger clock generator chip lower on the board. I was lucky. Looks like the board was never installed too.
Also, pick up some double-sided Samsung PC800 RDRAM now (I just did). There's reason to believe they all will do 1066. When the official 1066 chips come out later this year, you can bet they are just binned PC800 and will be expensive. If you buy PC800 then, that's exactly what you'll get.