I love Fallout and the Elder Scrolls. But I have a feeling with the new ES game (Skyrim) coming out this fall they may turn their focus to that. Will New Vegas continue to be supported with new official DLC, the PC version has yet to receive any official DLC at all.
Don't get me wrong I am looking forward to Skyrim, but New Vegas is still pretty new and I would love to continue to see new content for it even after Skyrim comes out, I love Fallout and Elder Scrolls about equally so I hope they will be equally supported.
Anyone have any ideas how long New Vegas will be supported with new content?

FONV was developed by Obsidian Entertainment, Skyrim is being developed by Bethesda Game Studios, developement for one shouldn't interfere with the other.

Essentially what Hungry said. Bethesda has too much on their plate, and it's my fear that every Fallout is going to be similar to TES, because Bethesda has a lot going on and are not going to spend the time, and the money to make Fallout unique. Not saying that TES is bad, I'm saying that I don't want them to become twin sister series...

what is skyrimm exactly about anyways

If you want to speculate on potential future games please use http://www.gamesas.com/index.php?/topic/1155353-fallout-4-speculations-suggestions/. It's worth pointing out that many people were concerned that Fallout 3 would be "Oblivion with Guns" so if you liked FO3 I don't think you need to worry too much about the two series sharing too much - it will happen but I think Bethesda will be able to keep them distinct as well.

As for the topic at hand, I don't see any reason why developement of Skyrim at Bethesda Game Studios would impact the developement of Fallout New Vegas DLC over at Obsidian. I also get the impression that the FONV DLC were planned before the game's release . . . . and if they do well enough that additional ones are considered presumably the release of Skyrim won't interfere with this.