From this article:
-PS3 CPU will be produced in 65nm SOI on 300mm wafer
-XDRAM is in PS3
-PS3 GPU will be produced in 65nm without SOI + EDRAM on 300nm wafer
-PS3 GPU is not NV40 class chip; it is based on a new architecture
-Xenon will be based on 90nm tech
-There'll be e-dram on GPU, but it will also be able to access the main RAM pool.
http://pc.watch.impress.co.jp/docs/2004/1220/kaigai142.htm