The default sleep setting for WiFi on the Captivate is to turn off when the screen goes off. Does this still apply if one is streaming music via Pandora? For example, I started Pandora last Friday and connected the phone to my HiFi system for background music. Pandora was started while the phone was connected to my home wireless internet router. In all, Pandora was playing for about 5 hours, the vast majority of which was with the screen off. My question is, did the connection switch to 3G/Edge as soon as the screen went off? If it did, then I will have a large data transfer on AT&T. Just in case, I have changed the WiFi setting to always stay on.