I didn't pick up much while at the MSU Comics Forum, I didn't even take a sketchbook with me.
I did get a book from Jeremy (awesome birthday present my neice), a couple Mouse Guard prints from David, a Cynicalman print and mini comic from Matt Feazell, and a Usagi piece out of Stan's art portfolio.
And there was a guy set up at a table with an old style hand press (I can not think of his name, even though we talked for a while) who was letting people print a custom bookmark featuring Usagi Yojimbo. Of course, Stan was more than willing to sign the bookmarks at the very next table.
Did you notice the hand drawn dragonfly Stan added to the second bookmark?
Oh. almost forgot. I got the drawing of Usagi that Joshua was holding in the photo of him and Stan. He drew the one Stan is holding as well, and gave it to Stan just after he (Stan) arrived.