This deal has ended.
Buy.com has the 3-User Pack of Norton Antivirus 2007 for $0 after a $45 mail-in rebate valid through 6/30 off-sets the $45 price. Plus, shipping is free and there is no sales tax (except CA, MA, MD, TN). Norton is the gold standard in Antivirus software. Also of note: Buy.com has a $5 off $50 coupon for new customers and new Google Checkout users can get a $10 off discount for signing up (you can't get both). With the Google Checkout discount, you could actually make $10 buying this!