Here's a thread on the Canon EOS 5D Mark II since it seems most of the Prefix photographers are Canon users.

 We can say with pretty high confidence that a 5D successor, the 5D Mk II, will be hitting before '08 is out, and with Photokina coming up later this month, rumors are beginning to fly.

....

This comes from a dude that seems to be right a lot lately.

* 21.1 MP 1.0x
* DIGIC IV
* ISO 100-6400 L:50 & H:12800
* 5 FPS
* 3.2" High Resolution Screen (LCD)
* 19 point AF
* HDMI Out
* Liveview
* HD Movie Mode
* Viewfinder: 100% Coverage
* Full weather sealing
* EF Lenses only

 

http://gizmodo.com/5043240/unconfirmed-more-canon-eos-5d-mark-ii-specs-leak-lookin-good