Ah yes, that's true, we have both running, but nothing says we can't have another, or something else. What normally happens, is a host or a hostess, says "Round Robin, Block Challenge, Doll Swaps (Buttercreamcakeartist has been running at least one of these a month and the end time is two weeks from the start time), Fat Quarter Swap, Charms, ect." whatever, and they create a few ground rules. Like due dates that kind of thing to add a little organization to it.
Currently if you wanted to throw-in with that is currently open to join up. We have The Trick or Treat bag Challenge, which allows you to create a bag/tote of your choice in size for yourself for Halloween, and at the deadline we all vote on the one we like the best babeegirl said she's planning on making a goodie bag for the winner.
http://www.quiltingboard.com/posts/list/10904.page We also have a UFO Challenge
http://www.quiltingboard.com/posts/list/11034.page where we're encouraging each other to finish some of our abandoned projects by New Years. The picture page for the projects is here
http://www.quiltingboard.com/posts/list/11039.page
We also have a couple of fabric swaps:
Christmas Charms for September
http://www.quiltingboard.com/posts/list/10875.page
Fall Colored Noodles, also known as 2 1/2" strips cut biased edge to biased edge.
http://www.quiltingboard.com/posts/list/10611.page
You can find most of these in the Classifieds/Fabric Swap, but some of them trickle out in other areas, and most all of them end up in the "pictures" section once they get going.
If I missed any open ones feel free to add yourselves! :D Round Robin, and block challenges last quite a while to ensure that everyone can get what they need to get done, without stealing all of your time as each member has more or less time that they can give to a project. The current block challenge started getting members in May or June, and is set to end in Jan., the birthday block started before I was a member and ran for a year so that everyone would get blocks on their birthday, the round robin that jstitch started I think began about three weeks ago maybe a bit more, and wont end for a year. None of these things should stop a host or hostess from starting something new, just keep in mind the kind of time commitment involved for each thing. Christmas is comming and last year there was a Secret Stanta that some members did, but Christmas also means that individuals will have less time.
We're a pretty laid back group, you can join what you like and stand out when you don't have time. Anyone can host and somethings get picked up and others don't it's all in the mood of the group, and just because no one wants to do something right now, bringing it up again in a month or three might have everyone hopping. :D