You say you are thinking of starting a group ....
Although everyone is very eager to help in these endeavors, with the escalating prices of fabric, and the ridiculous mailing costs and restrictions by the Post Office, the price of just one block provided in swaps and such is getting to be ridiculous ......
There are a few members on this board who are involved in this Quilts of Valor project ... check thru the search function at the top of this page ... maybe a few of them could give you pointers on starting another such group ......
It might be easier to check with a local Church group or guild to help you out ...
However, for your project - What size blocks are you looking for? ... what basic colors or coordinating fabrics? Are you supplying the batting and backing ... or is this something you would prefer board members help you with? ..... Are you going to pick out the papers of paper-pieced blocks? ... are you going to do the quilting, or commission it out?
Think it through, let us know a little more, and I am sure you will get lots of help.