I happened upon Zedge when I saw a reference to ringtones and discovered a thriving community. With over 5.6 million registered members according to their web site, you won't grow tired of browsing the nicely done profiles that are complete with all the usual features: Details, Interests, Guestbook, Friends, private messaging, etc.

The public gallery offers free wallpapers, games, ringtones and videos from user submissions. Many of the most popular videos are not what I would recommend viewing if you have a heart condition - hot and sexy is a common theme here ... But there are many other categories to choose from including one that I've embedded below.