If I had to get FO:NV I'd get it on pc. But with FO3 I like a lot of the mods that were released. I played the 360 version first so I didn't get to the PC version until much later on. How quick will useful mods start popping up? I dont follow/frequent modding forums and sites.

I only have experience in the racing game community. There, game tweaks such as camera changes and graphics tweaks are being made straight away, actual content takes a few weeks at least. 

Well, it's the same engine. So yeah, it'll be instant. I bet some people are probably even working on it right now.

Some fixes and quick stuff will probably already have been made by the next couple of weeks, but more substantial stuff might take some months, but it'll still be pretty fast because a lot has already been made for FO3, so they know how the engine works and such..

good news I guess. I dont plan on getting the game on release so some good mods will be out by then.

I remember when Fallout 3 was released, it took a couple of months before any real content would get released, but that was because Bethesda didn't release GECK with the game.

it's not that hard to port over meshes and stuff considering it's the same engine as F3, the thing is, people would probably being playing the game for the first week, not making shit for us already. Be patient!

They've already released a high res nude mod?

It won't be long until the entire top 100 is filled with bikini armors and shit like that.

Mods to fix the PiP info display and textures?
 
They can't arrive fast enough.

Depends on what you want. Fallout 3 never got the same type of mods that Oblivion did, meaning expanded cities and story mods. (Which is for a lot of reasons, but that's another story.) 
 
For combat fixes and UI stuff? Probably within the month. Also, the fallout 3 mod community is way big on weird adult mods, so there'll be a lot of that.

" http://www.newvegasnexus.com/ "

I'd imagine people will wanna play it first...then mod it.