I recently found on Market HeyTell. It's a free app for both iPhone and Android. I installed it on my Incredible. It seems to be always running in the background and you can set it to show on the upper task bar. The only way to shut it down is to go into Menu/Settings/Running Apps/Stop.
I have been using it now for 2 weeks and it doesn't seem to drain the battery and I leave it running. For those of you that don't know what HeyTell is, it's a push to talk app that is free. You invite someone to your list and their name shows up if they have HeyTell installed on their phone. Then if you want to contact them, select their name from your Friends List, simply push and hold while talking and your voice is sent (a few seconds lag) to their phone like push to talk. Works across to the iPhone from an Android and back.
Was wondering if anyone has used this and what their opinions were of HeyTell.