Yes, Asamiya did some sketches at AZ.  He was out 
of the mood, though, when I was near him :-(

Saito did do a few sketches, not at AZ but at 
Anime Central.  Someone had a nice Utena one 
there.  She and Ikuhara mainly were just drawing 
ChuChu if they did sketches - I wanted Touga but 
settled for ChuChu