I know tons of Dsi campadible sites!So I'll try to write every single one.
-http://dsitube.webs.com
A place for the nintendo dsi compadible video site.
-http://dsicade.com
It's like a dsi arcade where there's games like Dsipaint demo etc.
-http://dsi2play.webs.com
-http://dsimap.com
-http://dsivid.com
-http://dsishare.com
-http://dsi tv.com
These are pretty much all the dsi friendly sites I know.