This tool is intended for anyone running a pre-Gingerbread OS, rooted or not. It was recently discovered that certain apps installed malware which rooted the phones they were installed on, then proceeded to transmit personal information to the developer. The apps were removed from the market, but if the apps are/were installed, your info could still be transmitting yer junk! Leave it to the devs at XDA to come to the rescue!
This tool will search your phone for a particular file created by the aforementioned dirty apps. Click the link above for more info, and decide for yourself, but I DEFINITELY reccomend the installation and utilization of Droid DreamKiller!