OK, finally finished a quick and convoluted README - and linked the download to my signature here.
Caymuc:
1. You are correct, I really dumbed down the test version...anyone could get in there and do anything. Normally (and with the downloadable version), only Moderators or Administrators can WRITE. Read access depends on what board you tie the calendar into...
2. Birthday entries...not at this time. Reason being? This is completely separate from UBBTHREADS (it creates one table for the calendar data)...and therefore does not read profile data. It might be hacked to do so...it's an interesting thought!
This thing is very basic - I am not a php programmer...I just have the talent to be able to read something and figure out how to change it. Hence this addon, heh! So anyone that has any improvements or ideas, I would love to incorporate them.
Leaves? Use em!