Motorola Droid : Pandora Quitting After 30 Minutes?

My brother in law turned me on to Pandora this past weekend. I knew about it and even poked around with it a few years ago, but never "got into" it. Having bailed on renewing my satellite radio subscription recently, I thought it time to check out Pandora. He taught me the ropes and we set up 2 channels to drive home with. Fire it up, worked fine. Turned on the Satellite Layer in maps to show him his neighborhood in a live GPS route - almost immediately Pandora crapped out on us. I presumed it was a bandwidth issue with loading satellite imagery as well as streaming audio. Had to kill the app and restart. On our way back home however, it died again - working fine, fired up another app - one that saves my track logs to a file for later examination. As soon as this app started, Pandora stopped. OK, Pandora needs a clear pallate, whatever, for now, we'll give it to her. Fired it up now a 3rd time - it ran like a champ - playing a new mix much better than what we used to get on XM Radio. Love it, wish I used it earlier. However, it stopped dead in its tracks right about 30 minutes after we started it. Had to go into App Manager and "kill" the Pandora app, then re-start it manually. It ran this 4th time for again, right about 30 minutes. Fired up again and thankfull we were only 20 mins from home, were able to listen to it into the garage.