Bunny, thank you for saying exactly what I was about to say after reading the first page, with people saying you can't modify anything. Probably they misinterpreted the statement that you cannot modify the associated source code (meaning if it's packaged with source code, you can't modify that in a subsequent release). The functional scripts of any new release can be modified to no end (except the credits of course).

I'm currently working on a XOOPS powered site for a local Performing Arts Series. www.nmt.edu/~pas/uber/
I have written my own module, called TheaterMan to handle the administration of a series of shows, I have done extensive debugging of eCal (including fixing the horrible translation in the language file) and I've modified the system block to not have the stupid "Home" link (now my Home link goes to the sections module).

I'm almost done editing templates to create a consistent look, and next week I should be able to put a little more work into the actual theme.