My all-time favorite comedian is probably Mitch Hedburg. Along those lines I'm also a big fan of Steven Wright.
Last week I saw Aziz Ansari perform, he was pretty good. All though he does not really do one-liners his delivery mirrors Hedburg and Wright.
The week before that I saw Pablo Francisco perform. His impersonations are very funny. I'm sure a lot of you heard him do the "movie previews" guy, but his new DJ/techno club skit is very funny as well.
Last year I saw Lewis Black perform, he was decent but not my favorite. Nick Swardson is also great live.
For my video link contribution I'm going to go with Freddy Soto - who I've always found pretty funny.
http://www.youtube.com/watch?v...lated
As a bonus, Pablo Francisco performs right after him in the video series.