I actually happen to be running a Mystery Shawl right now. We're about three weeks in, but that's not too far along for the size of this shawl. The third clue I only posted today. The pattern is for a shawl, either square or triangle, in three different sizes. The largest sizes use approx. 3000 yards for the square and 1500 yards for the triangle. If you like, we can start some kind of thread here about it; it's hosted on a yahoo group right now.
http://groups.yahoo.com/group/galkal/