Tweego was the last program I was using before my N900 crashed. I using Tweego and was on a train going through a tunnel, which supposedly had internet connectivity, the only other program I had up was Firefox. I told Tweego to do a refresh and during its operation the phone crashed, and in this case when it crashed, the phone shutoff. I haven't been able to boot up the phone since. I'm attempting to flash it now. If you feel that something else caused this, let me know. I'm more than willing to change the subject of this thread to fit the cause to my woes.