I've also used this one for free.
Some of the pros of these sites is they generally have a lil community of their own with forums, feedback comments, ratings, and charts.
The biggest con is they generally don't allow direct linking from other pages to automatically open particular songs. But you can still link to your particular artist page.
[FONT=Palatino Linotype]"Bust a nut!" - Dimebag
"Imagination is more important than knowledge." - Einstein[/FONT]
"Imagination is more important than knowledge." - Einstein[/FONT]