Dean, yes they do have a publisher (can't quite remember who), and from what I remember from a while back, 3DR have been pretty rude to them.
The question is how *can* you be too excited about this game, we have absolutely no knowledge of what's in the current build (all the old screenshots and info are now of course obsolete as that build was scrapped) beyond the obvious, and it's been an incredibly long time since the last FPS Duke game. For all we know, the devs might have lost their touch with time- John Romero took a long bit of time-out to make Daikatana and look how that ended up. Some might say the same of Id with Doom 3. God knows Sega's Sonic team hasn't been up to scratch since they moved on from 16-bit consoles. Personally I won't get my hopes up on DNF until I see something juicy pump out of 3D Realms.