Does the Droid get spyware and viruses like my desktop PC?
If so is there anyway to guard against it? Like a Macafee or Norton type program.
I'd be more worried about installing an app that gathers too much data about you. Luckily, you can see what an app has access to before you install it.
Another thing to look out for is "rooting" with a ROM from an untrusted source.
Overall though, I'm not worried about my droid's security.
One last word, do not install the antivirus app on the market. Since there are no know android viruses, it is quite a waste of resources.