Self-portraiturists rejoice: Anish Kapoor's "Sky Mirror" sculpture was unveiled this morning at Rockefeller Center. Any photoblogger worth their memory card is planning a visit today, so to get into the spirit, we're going to award a Gothamist t-shirt to the shooter who captures the best sky-mirror shot. Add your link in the comments below, and we'll announce a winner at 6pm. To get things started, here are some shots that have already been taken:......