The Toontown Hall of Fame (inside the County Bounty shop), as mentioned before, is made up of three seperate rooms- one of classic characters, one of Pooh characters, and one of Princesses. When I was there in January the line-up was Minnie, Goofy, and Donald in the classic room, Pooh, Tigger, and Eeyore in the Pooh room, and Cinderella, Aurora, and Snow White in the Princess room. Characters can varry, but these are the ones that seem to be there most often. The Princess line seems to move much slower than the others since all the characters are usually face and spend a good amount of time talking with the guests. If you really want to see the Princesses with a short line, be sure to be there at 10am when it opens or during the last hour before the Princess room closes (check Times Guide for hours).
Mickey's line at the Judge's Tent (behind Mickey's House) does move pretty fast compared to Hall of Fame.