For me it is a Bell Sympatico ad for new Ring Tones. I've already emailed them and told them in no uncertain terms that I will never, ever, ever, buy anything from their site because of these ads. It's more than annoying, it's seisure inducing.
Cause I've had the same e-mail address since 1994, and I also get support, dns, netops, news, jobs etc etc since I'm the Network Admin for a largish ISP in Canada About 300 a day +/-, more in the last 2 weeks or so.
If you are running on a Windows machine, PopFile is probably the best email filter out there right now. Works wonders on my wife's machine where she gets spam, spammy type messages that arent' spam and regular messages. She's running at over 99.2% accuracy.