I'm getting a load of these as well. The actual emails do not contain any virus as such, but any links will lead you to a malware site for a trojan downloader.
Best thing to do is set up a filtering rule to delete these emails. Or like me, get an email address for anything your not sure of and an email address for people you trust. I frequent quite a few forums (a google for walesrob will confirm this!) and I use a "disposable" email address from Fastmail, so I can kill the email address if it gets spammed.