I would have to agree here with Cozboogie the best thing to do is to play with it, you can check out the post
http://forum.ppcgeeks.com/showthread...ight=post+your which is the Post your PPC-6800 Today Screen to get a feel for different customizations other users have done. Don't be afraid to add stuff because once you start you will find that just when you have your Today Screen and everything pimped out there is something new that comes along. I would start out with simple stuff and then move into Custom ROM's and things. You will find that most of your time is going to be consumed by reading new threads and adding different applications.