Supposedly the specs are as follows
CPU – Custom IBM Power 6 Chip (Codename Fox), Quad Core 3.5Ghz
Graphics – Custom AMD RV770 (Codename Wolf) 766Mhz
RAM – 512MB XDR2 DRAM (Main), 1024 GDDR5 VRAM (Video), 16MB eDRAM
Storage – 2.5″ 250/320GB SATA & Expandable storage via SD/SDHC card up to 64GB
Media – Custom Bluray & compatible with Nintendo GameCube Game Discs & Wii Disc
Display – Composite – 480i, S-Video – 480i, Component – 480/720/1080, HDMI – 480/720/1080
According to this 'internal' leaked document that's the specs anyway. And on another note the Nintendo Wii 2 controller is 'rumoured' to incorporate a camera
(link here)