ICS has been officially released for the Rogers (Canadian) version of the Skyrocket. Rogers releases updates for android phones faster than AT&T since they add less bloat so there's probably less testing required.. There is a port of the Roger's ROM on XDA for the AT&T Skyrocket - Sky ICS UXLF. It works fine - much better than any gingerbread ROM I have seen as far as speed, battery life, and features. It appears that development of new versions of Sky UXLF have stopped in the last couple of weeks as the dev is now working on a jellybean port.  I would bet that it will be released in the next couple of weeks but the Sky ICS ROM is fine until then.