If you search on this site or WME (
www.wmexperts.com) , you'll find that there hasn't been any real threats reported. The viruses that DO exist are of the proof of concept variety. This isn't to say that viruses (or is it virii?) couldn't be utilized against the WM platform, but given the number of years that WM has been around in one form or another (going back to the Windows CE days) and no attacks, I would say the the likelyhood is farily small. The rules of web browsing on your PPC are the same as the ones you would use on your PC, i.e. only go to trusted sites and don't open emails from untrusted sources.