Every time that I get in my car, my phone doesn't connect to the Bluetooth system automaticallty. I have to go to settings to do it manually. I tried several workarounds that exist over there (wifi turn off/on..) but nothing works. I read that this issue is probably solved in Froyo.
I found this Always discoverable on Android but I'm not sure it is related with my problem.
Finally, I look forward to hear from Google about my AppInventor invitation, in order to do a simple app that do the dirty work.
Did anybody find a good solution?