The overflow system is not just a beta thing. It's something NEW that ArenaNET is bringing to the MMO-table. In theory it's great, but in practice, as experienced during the beta, it needs some work. Frankly, all they would have to do is make it so that you can join your friends on their overflow server, and be put into the same queue that they are.

http://www.pcgamer.com/2012/02/23/gu...s-kill-queues/

That article explains it pretty well.

Basically, it replaces the old queue systems of MMO's nowadays. Instead of waiting an hour just to login to the game, you can play while you wait to get into your server. Very smart.