I use Google Listen and WinAmp daily and have notice that the Media Server/Service (which both use) is draining the battery (BB .6.2.1). The battery drops from 70% to 20% after 30 minutes of use vs 5% drop of using the phone for 30 minutes.
The battery drain only occurs during playback, so I can confirm it's not Google Listen (as an example) downloading podcasts all the time.
