Okay, I just went through and read all of the posts in the thread, and as for weaving in the outside end, I'm going to check with my partners, since I didn't start any yet. If my partner hasn't woven the ends in, then I'll send a set with unwoven ends. And, if they have woven in the ends, then I'll weave them in as well. That way, it seems more fair (since I loathe weaving in ends
As for colors, I'm thinking that I might use black to do all of my joining. I have a bunch of small balls of yarn from the Odd Ball Swap and they were destined for a scrap afghan. If I use that yarn to get me started, I should have a wide variety of daughters to send. I also have a bunch of yarn that was donated for my classroom, so I can snag a few small balls of yarn from there, as well.