The 2010 FIBA World Championship kicks off today with 12 games. It's available in full on ESPN3.com if you can get it, and some games will be on NBA TV. Team USA's matches will appear on the ESPN family of channels; today's Croatia tilt is on ESPN Classic.
I highly recommend Marca's beautiful calendar for seeing which games you want to watch. Besides USA-Croatia, I'm most interested in Spain-France, Argentina-Germany and Canada-Lebanon.
First games tip off at 6 AM PT.