I occasionally get server too busy messages too. Sometimes using IE instead of Firefox works. It probably does what it says on the tin IrishMorn, the site has trouble connecting so many people at one time. Notably, it happened to me during much of the time before Lionhead announced the DLC for Fable II. Seems the site must have got flooded with guests and members at that point.
But it also seems to happen at random times and I'm usually not alone since a lot of those who regular the
LHpub get the problem at the same time.
The only thing worse than beating a dead horse is betting on one.