It's so frustrating seeing everyone praying for their new 5d/7d/60d/ti etc!.
I find myself in a hard place right now, I'm an owner of a 1d mkIII and it's getting close to the time for an upgrade. The pro body is the only choice for me as I need/use the pro features of the 1 series.
My choices are the 1ds mkIII (its basicly the exact same camera as mine, but a slightly larger sensor, more mp and half the framerate) or the 1d mkIV that gives me a few more mp, a tiny improvment in low light noise and a better lcd screen for 2x-3x the price that my current body is worth and its not FF.
I really think Canon need to push the development of this new 1 series before they look at any of their other lineup!. Their only pro body full frame camera is older than my middle aged pet dog! I really am waiting as patiently as I possibly can for the new 1 series full frame camera and I'm losing some hair over it!
If I never had so much money invested in glass I would probably be looking at entry level medium format cameras by now.
A few release dates so you can see where I'm coming from...
1ds mkIII Aug 2007 (update it now!)
5d mkII Sep 2008 (not very old, but sure update it after the 1 series)
7d Sep 2009 (whats actually wrong with the current 7d?)