5 days per week.
4 for new content 1 for aq40 but if we don't finish aq40 for whatever reason we'll use one of the new content days.

Our guild (fairly small, ~50 raiding members) is only up to BWL at this point, but we generally schedule 3 or 4 40 man raids a week. The other days are spent farming 20 man instances (and we've been able to compact a ZG->AQ20 run into a single night). The only time we aren't raiding is when our available raid instances are already cleared.

We've had some issues with BWL attendance, though. :(

We raid everyday except tuesday, since on a lot of tuesdays, especially patch days, it's impossible to play. Plus, people need breaks, right?

Days like friday and saturday are light. We still get a fair amount accomplished though.

When Naxx initially came out we wanted to push it pretty hard with raiding 6 days a week but attendance has slipped quite a bit as of late especially on Saturdays. Weve decided to do some more recruiting post-merger (We merged the two top horde guilds on our server at the time in the hopes of killing Cthun) to fill in the ranks a little more to give us some stability with some leaving due to not liking the merger.

So instead were going with 5 days with Fri Sat off and using two days for new content. Were finding the summertime is burning people out quicker than expected. I blame the nice weather for it :P.

Hang in there Scud or ill beat you with a baseball bat.

naxx naxx naxx! 4 days, sometimes bwl or aq on sat if enough people show and what they want

What guild?

With Naxx out, our guild just adopted a 4 night raid schedule with 3 nights dedicated to Naxx, and one of BWL/AQ40 each week. We spend about 20-22 hours raiding per week. Our raid group is small and tight knit, with pretty much the same ~45 people showing up every raid night, and I don't think we could stomach more and maintain current raid attendance.

Unfortunately, with the size of Naxx, there doesn't seem to be much relief in sight anytime soon, and we are probably going to stick with a 4 night raid schedule until expansion.

My last derail, but Excessive.

I haven't contacted Tahurs in fear of being blacklisted from talking to him, their recruiting rules are pretty clear.

I do this way too much too, and I hate it.