Ok we've had some experiences with the Raid Lockout Extension thing this week, so here are the facts (as it was a bit confusing just what is going on):
1) You can extend the lockout of a raid (seemingly) indefinetly by a week at a time.
2) You can remove the lockout only during the week that you extended it.
3) Once you enter the extended part of the lockout (i.e. the 2nd week), it becomes the new lockout (i.e. the 1st week). That means you cannot undo the lockout back to last week. You can only extend it again (and undo that second extension). In other words, once you enter the extension part of the lockout, you are irreversably saved to it for another week.
4) Only the raidleader(s) has/have to extend it. New people to the ID automatically enter the ID of the raidleader, as normal. No individual extension required.
For this week it means several things. We cannot reset our 10 and our 25man raids to a fresh lockout for this week. Tonight we've cleared the 10man Ulduar so whoever was saved to that and extended their lockout/was present wednesdaynight will be saved to it for the rest of this week until 19th of August. For the 25man goes the same, we're saved to the 25 of last week until 19th of August and cannot start a new one.
This means that if for whatever reason we can't do 25man Ulduar this week (if bosses are too hard or if we don't have people or w/e), 10man Ulduar is not an option for quite some people (the people who manually extended before wednesday the 12th and the people who were present on the 12th raid). Just for info =)
Good info there.
And for the remaining 25 man which we extended this week I don't think it'll be a problem as we've had plenty online for the last few weeks now.
We also have Ignis, Assembly of Iron left up outside. Inside we have Thorim to nail, then onto General and Mr Catfish.
I think there is more than enough there to keep us going.