Easy solution for mixes of 100Mb or less is
http://www.yousendit.com
Type your email address in the first bit, select the file, and upload.
When its done you get a link emailed to you which you can post alongside your tracklist, and anyone who clicks on it can download the file from YSI.
It's good for 7 days or 25 downloads, at least I think so, they seem to be changing the rules a bit at the mo....used to allow 1Gb files...
If you don't mind paying the odd couple of quid a month try
http://www.djsandproducers.com Great site, and Sinergy who runs it is spot on (And a trance head). Used them for over two years now without any problems
