Gahhh too many to name for me, but the ones that I've been trying to keep current with are The Dresden Files, The Event Group, and Chess Team,

One of my favorite series was Jim Buther's Codex Alera, which he made on a bet:

Quote Originally Posted by Codex Alera Wikipedia
"The inspiration for the series came from a bet Jim was challenged to by a member of the Delray Online Writer’s Workshop. The challenger bet that Jim could not write a good story based on a lame idea, and Jim countered that he could do it using two lame ideas of the challenger’s choosing. The “lame” ideas given were “Lost Roman Legion", and “Pokémon”."

While I don't think the ideas are lame, I'm glad the bet was made, one of the best fantasy series I've ever read