If you have a Mac and have been waiting for Garmin to make Training Center Mac compatible, your wait is almost over. If you will be at Mac World in San Francisco in early January, you can pick up a CD there. Otherwise, you'll have to wait until late January to download it.
If anyone is going to be there and would be kind enough to pick me up a CD, I'll gladly pay you to ship it to me. If you're technically inclined, I can also give you FTP access if you want to burn me an ISO image and upload it. I'll even throw in a beer or so.

