iPad Ideas

Can anyone recommend any apps that I might find amusing, entertaining, and time-consuming for my 13 hour bus trip down to Cullowhee, NC next weekend?

I have a few games - Word Solitaire, Cover Orange, Words With Friends (rdarcy22), and Coin Dozer (highly addicting).

I also have the BlogPress app for keeping my blogger-backers updated.  I've got the NPR app and ESPN ScoreCenter.  I love the Adobe PhotoShop Express.

Any other ideas?  Preferably free apps or anything under $1 or $2.