I do very hope so because if there isn't then how will we tell the difference between new vegas mods and regular mods for fallout 3, unless they have a different section for them,
They managed it just fine with Morrowind and Oblivion, so I'm sure they'll come up with something.
another thing i'd like to touch bases on is FOSE, i'm sure there will be a FOSE for new vegas, and I wonder if FOMM will work too...
There's no guarantee that we'll have either of those. Both were done by private modders, and I don't recall any mention of the authors continuing their work with New Vegas. Of course other people might, and no doubt will, pick them up and work on them if they don't but you shouldn't make any presumptions at this point. I'd say FOMM was a more likely bet than FOSE. And no, the current version won't work for New Vegas, at least not as is. It's currently tagged to the Fallout 3 exe and Data folder.