Here are just a few links that I've begun collecting as I scoure the web for anything that might relate to my quest for Superhero status.

www.trickstutorials.com/
I don't know who this dude is, but he's got a few things going for him - he can bust out the flips like a crazy man, and he has that slightly tweaked sense of humor that appeals to me. Plus, he's got tutorials about acrobatic stunts, such as aerials, backflips, etc.
www.urbanfreeflow.com/
This is THE site for Parkour. These guys are helping the rapid and global expansion of the sport thunder right along. Additionally, the overall philosophy of the sport appeals to me.
www.uer.ca/
Urban Exploration is basically recreational tresspassing. It's about going where you aren't really allowed to go. It's not malicious or anarchistic, but it recognizes that individuals can occassionally step outside of the system in a responsible, respectful way. And think about it - do you think Spider-Man has permission to hang out of various rooftops? I think not.
www.screwgravity.com/

Another great Parkour site, with some excellent photos and videos. You should quickly understand why I think Parkour would be an essential peice of superhero training. Feel free to check those out, then come back to comment!