I have a rather large board, but the server it's on could probably host several of these as it's a Dual Woodcrest with 4GB RAM.
I have a problem when editing larger posts (even just a few hundred words long), where the following error message shows up on a blank screen:
Fatal error: Maximum execution time of 30 seconds exceeded in /home/mecz/public_html/forum/libs/ubbthreads.inc.php on line 838
Any ideas on how to fix this?