I haven't really been here long, but something i have found annoying is the maximum character limit on sending PM's and the 10 seconds / 30 seconds to wait between viewing todays posts etc. Can you not cache them for say 30 seconds and remove the seconds you have to wait, it's just plain annoying. And for searches can you not limit it to say 5 searches every 30 seconds so normal users don't get annoyed it with, but people trying to cause trouble would.
Kind regards,
Scott