http://www.wow.com/2009/10/21/patch-...lfg-interface/

Essentially with the new lfg function you can get extra badges or up to 68g for running a full PuG instance so for anyone 5-boxing, or even less boxing with friends, may as well have all their characters go into LFG for the instance you are going to run and then have your main accept the role of group leader (for more rewards) and then invite each member of your team from the LFG interface.

Yes it's a little slower to get your group joined up then using a macro or jamba but it does give free money and we all love that