Endeavour goes up this afternoon. In fact, in approximately 29 minutes from right now. If you're interested in watching live broadcasts from NASA, via the free NASATV site, I can strongly recommend it.
UPDATE:
Only because I wanted to post this pic taken some 7 seconds after Eneavour lifted off from Launch Pad 39a. Seriously, if you love watching these birds fly while worrying just a little about the danger to the astronauts, you can't beat NASATV.
