Now also free @
Sony (available to Canadians) and
Christian Book (available worldwide).
And since it looks like the thread title's going to end up kind of cramped, probably shortening the genre to just "Humour" would be the best way to make it fit, since now that it's at CB, it'll be pretty obvious what kind of books they carry from the store name and the target age range is pretty much All Right There In The Text anyway.