This hasn't been mentioned here yet, so...
According to DVD Talk, the bonus cartoons are:
The Country Mouse
The Lyin' Mouse
The Mice Will Play
Shop Look & Listen
It's Nice to Have a Mouse Around the House
Merlin the Magic Mouse
Not a bad list, but it's perplexing why The Mouse on 57th Street was left out. I mean, it's a cartoon starring a mouse; why not include it? Oh well. I do like how much is included; there's more new-to-DVD/BD stuff here than the upcoming Platinum collection. Hopefully "Mice Follies" will use a better audio mix than the version on Saturday Morning Cartoons Vol. 1; that one had such muffled audio that it was hard to hear the background music.