(Image Source: io9 Year for Urban Fantasy?)
What is Urban Fantasy?
I ended up using wikipedia for this but oh well. The basic definition is a subset in fantasy defined by the location, which is an "urban setting." Often times the story is set in modern times (with some exceptions) and there is a fantasy element that is usually under the category of supernatural. While there are different time periods and fantasy elements used, the setting is what gets the subgenre its label as "urban fantasy."
One place to get information and to meet people in the subgenre is the chat on twitter called #UFchat. Using tweetchat helps and it's a great environment for those who enjoy Urban Fantasy or just want to learn a little more about it.
Ilona Andrews Holly Black
Patricia Briggs Jim Butcher
Neil Gaiman Claudia Gray
Laurell K. Hamilton Simon R. Green
Tanya Huff Devon Monk
Melissa Marr Kat Richardson
to name a few...
As I said above, I'm new to the subgenre. I think I've read maybe one or two books so far but there are a few on my list of books to read. So, I don't have a lot of information to provide. Here are some websites to consider. Also, check out urban fantasy bloggers because there are plenty out there for sure.