There are other themes you can "unlock." I think there are instructions buried in the OS thread I linked above. Also you can get the info here
You'll need to enter your TCP settings again. Go to Options >Advanced Options >TCP and enter the following:
leave the username and password blank.
Edit: I use the Dimension Today Plus theme available from http://mobile.blackberry.com
It is a zen theme with icons. It also lists calendar, phone logs, and messages on the home screen or if you move the cursor to the bottom of the home screen it is just like the TMo Zen theme. it's a nice theme.