We have done Sea World and Universal swaps in the past- generally they have been in the fall and tend to not have too many swappers (not that we care how many swappers are in a particular swap). The last one was in the fall of 2008 so we should probably try to do one this year.
If one is held, I would be in for it. We went to US/IOA (harry potter wasn't open yet, but we saw the buildings/construction) in January & I just got back lots of pix. Of course, I'm still working on last year's Disney pix plus all of 2009.