Well that's assuming you have the means to burn CD-Rs already.
CompUSA is running a promo that ends today (Wednesday, July 3) on a 50 pack of Philips CD-Rs. Get a $5 instant savings and then send in for a $15 mail in rebate. When all is said and done you paid $0.01 plus tax. The CD-Rs are not the cheap kind, either. They are a spindle of 50 700MB/80 minute 40x CD-Rs. The limit is one mail in rebate per household (there may or may not be a limit on the $5 instant savings). It may not be the brand or type you prefer but considering you could give away 50 CDs of your AMVs at cons this year at no cost it's a fine deal.
For details and to download the rebate coupon go to http://guide.apple.com/hotdeals/compusa/index.lasso. And no, you don't have to have a Mac to use the deal or CD-Rs.