I just optimized the database, I hope that will fix things.
Also, the reason why CPU quota exceeds is the use of large images in avatars (e.g. > 60KB) on external hosts (ImageShack).
After a short chat with Bluehost I decided that to wait for one more week. If things don't improve, I will "update" my account to an "High CPU usage"-account (which will cost me $150)
(... think [ http://www.weirdalforum.com/donate01.gif ] ... )
So, please make sure your Avatars are not bigger than 60KB 14KB!!!!