If not, have you thought about it?
I've been involved in five Round Robins so far:
The first was organised by the A Noble Needle Yahoo Group. It's theme was a beginners RR - but as it was leading up to Christmas - the other three members picked a Christmas theme for their designs. I stuck to the Bears from Around the World. If you look back at my Completed in 2001 page, there's some images there from it. My own piece of material can be seen on my Yahoo Photo Pages, it's Theme was Teddy Bears. This robin ran smoothly without a hitch.
The second RR was also through ANN. It was called Fantasy 4. It's theme was Fantasy and we stitched dragons and fantastic creatures. This robin also ran smoothly without a hitch, although some of the fabric did take a while to make it home. I met my friend Piwi though this Robin. I picked fairies as theme for my robin. Here's a picture of the finished piece (although I still have to add a few more embelishments and frame it. There are other pictures of the pieces I stitched for Jennifer, Katt and Piwi here. On Piwi's piece, I did Teresa Wenzler's Tempest in a Teacup. Loved stitching him, may do him again at some point in the future - he turned me into a real TW fan.
The third RR actually completed before the second one - it was a Christmas themed RR which I stitched with My Mother, My Aunt and my aunt's friend Karen. You can see this in my 2002 Finishes.
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The fifth RR was an Easter Themed RR which I organised myself on my UKCSF Yahoo Group. The RR went OK to start with until all the problems happened with Sean! Curse him!