All these cards coming in early 2008, between January and Fabuary.

Radeon HD 3650

　　Core: RV635
　　Fab: 55nm
　　Core Clock: 800Mhz (RV635XT) - 600Mhz (RV635Pro)
　　Mem Clock: 1000Mhz (2000Mhz DDR)
　　Memory: 256MB -512MB GDDR3
　　Mem Interface: 128bits
　　Interface: PCIe 2.0

All these cards are expects in the early 2008, between January and Febuary.

Radeon HD 3470
 

　　Core: RV620
　　Fab: 55nm
　　Core Clock: >600Mhz
　　Mem Clock: 500Mhz (1000Mhz DDR)
　　Memory: 256 -512MB G DDR3
　　Mem Interface: 64bits
　　Output: TV-Out, VGA, DVI-i.
　　Interface: PCIe 2.0
 

Radeon HD 3450
 

　　Core: RV620
　　Fab: 55nm
　　Core Clock: 525Mhz
　　Mem Clock: 400Mhz (800Mhz DDR)
　　Memory: 256MB DDR2
　　Mem Interface: 64bits
　　Output: Display Port , VGA
　　Interface: PCIe 2.0

[Source:madboxpc]