Some of the antivirus programs also offer tools to remotely track, lock and wipe your phone. Given the relative lack of security that android offers, especially pre-2.2, combined with the large amount of personal data you can end up with on your device I would be a lot more concerned with that functionality than the actual virus scanning functionality.
Unfortunately I haven't really found one I can highly recommend yet, they all seem somewhat mediocre still.
Do NOT PUT IT ON, it will just mess up the phone. This is not Apple with iphone / iPad
NOT needed for Android. I read some where that it will only slow down the phone and the Android OS. Will try to find link to article.
