I tried out a theme earlier today that changed my default buttons on the today bar (Contacts and Calendar) to something else. I'd like to change them back, or even better, set them to whatever I want, but I can't for the life of me figure out how.

Can anyone help?

Do you have type to today screen plug-in?? Such as Spb Pocket Plus or Pocket Breeze or somthing similar. If you do, then you can go to the options menu of the program and program your buttons to whatever you want.
If you don't have any type to those programs and are using the Axim's default today screen program, I'm wouldn't know how. I'm not even sure if you can.

I hope this helps. I, personally, have Spb Pocket Plus and have my button programmed the way I want them. It is very convenient.

Hands off!!! Get your own Axim!

There is an application for that, check this thread you'll assign whatever application to the soft keys....