I'm right there with you, buddy! (Welcome to NR!)
I'm sitting tight also. My new D7000 is still keeping me busy, and I'm continually impressed with the decent results it's producing at ultra-high ISOs. But, I'm definitely determined to shoot FX for stills someday (I bought the D7000 primarily for video, although, of course it's also my primary still camera for now).
I hope to shoot a large assignment this summer with a full-frame body. However, since the D4 is likely to precede the D800 (most likely, by many months), I may have some serious decisions ahead. A new D4 body, plus the four new AF-S f/1.4 lenses I want (24mm, 35mm, 50mm, 85mm) will total $10K+ USD.
Studio - would probably be safe to say that the JUne 2008 release of the D700 will be followed up with a JUne 2012 announcement and subsequent release of it. . .
Looks like the D700 literally fell in the "Pro" camp for Nikon, so. . ..4 year update cycle FTL :-(
But good news is that it could get:
Either the D3s updates + 1080p video OR
D4 sensor, slower FPS, and 1080p video.
Either way, we win. . .I'm considering down sizing to the D700. . .