On this board, there has been only one big IRR at a time, lasting about a year. The THIRD one just started, and the second one is just now ending. Terri just posted the list, and there are more than 8 groups (I didn't join this one, so don't know the exact number). The members are placed into groups of six people each, and that is who works on each quilt. So while it might seem like there are 8 or 9 different IRR/RR's, there is only actually ONE, with a whole lot of groups. At this point, you will need to wait until next year, or sign up with Terri and hope someone drops out and you are an alternate, or get 4 or 5 of your friends together on your own and do a round robin with them.
There may be some smaller round robins posted under the swap topics.