http://www.worldofwarcraft.com/burningcrusade/faq.html
Will the current 40-player-capped raid dungeons remain capped at forty players even once the expansion releases and players can level to 70?
At this time, we have no plans to change the player caps of our existing raid dungeons.
Question is - will guilds keep the 40 man teams to raid Naxxramas in the first weeks of TBC or just stop doing all the old content to quickly switch to the new one?
I wonder how a raid week could be set up to please both, the levelers and the raiders.
What do you plan based on this information for your guild / What would you do if it was up to you to decide?
Atm I'm really puzzled.