Update: you can find the full list of highlighted mods on our NeoWiki, updated regularly.
The updated GECK was released yesterday for Fallout: New Vegas fans to toy around with, and already a load of mods have poured in, all to be found on the new community HQ (link at bottom).
Early word is modding is almost identical on New Vegas to what it was with Fallout 3, so a lot of the mods should be updated for compatibility very soon, though a few are already.
Naturally you probably don't want to sort through the muck, so that's what we're here for. See below for the highlights so far.
Significantly improves performance on all varieties of hardware with a simple .dll switch.
As of now this simply contains a few minor bug fixes and edits, but eventually it should transform into a full-fledged overhaul like its predecessor FOOK 3.
A neat little mod which removes the sometimes erratic behaviour of bullets and replaces it with something more realistic. Minimal changes are made so there are no effects on the VATS system for example. Also, crosshairs will light up at much farther distances so it's easier to tell enemies from friends. Compatible with all guns and includes various settings.
This turns New Vegas effectively into a sandbox game where you can wander as you please.
This deepens the VATS system by making damage and accuracy more dependent on your personal and weapon stats.
As you may have heard by now, it turns out the game's Hardcore Mode isn't actually that hardcore. This mod makes the elements like sleep deprivation, starvation, and dehydration "matter." There are also numerous tweaks like doubling all damage (because shooting enemies 5-10 times is just...weird), perks occurring a little more often, leveling less often, all loot and creatures unlocked (so you can encounter super tough baddies at level 1 if you don't watch it), and much more. Be warned this is not compatible with mods that alter the same settings. Highly recommended if you love a realistic challenge.
Does what it says -- centers the third person camera and/or raises it above the character's head. The neat part is the ability to zoom the camera twice as far back for perhaps a more traditional feel.
Improves mouse movement. This is actually a simple .ini tweak as opposed to a real mod, but necessary to include nonetheless.
"It's a fox mask, you wear it. You can be foxy, or not foxy while wearing it if you like. It will not bother me one way or the other."
That's all for now -- we'll have a proper mod guide up once the community really gets going. Feel free to send your own mods or great mods you hear of to tipsATneoseekerDOTcom for coverage.