Mug Hugs is very cute and most of the projects would be quick knits. There isn't much call for a mug hug at the moment but come winter time, they might be nice.
Brave New Knits has some fantastic projects from knitters from the blogosphere. Quite a few are difficult and for someone who really likes to concentrate while they are knitting. I'm going to choose one or two of the easy knits so my mind is free to wander just a little while I knit.