Found a great article from the Photojournalist Association on using music legally on your photography websites… or just websites in general.
Here is what I believe the be the meatiest part of the article:
“Unfortunately, a large number of wedding photographers use music on their sites illegally, whether through a lack of familiarity with the law, a rationalization that their use is “promoting the artist,” or blatant disregard. This is ironic, since like photography, music is creative property, and the legal rights of its creators need to be respected.”
Hope this was helpful. I know it answered some questions for me when considering what music for my site.