In Japanese, there are about 2,000 kanji characters designated for daily use. Have you ever been sitting around, studying kanji, and thinking, "Gee, I wish I had a poster of all of these kanji that I could write on with a dry-erase marker"? Well, if so, you're in luck, because KanjiPoster.com has just that for $35 (including shipping).
You can also get a T-shirt with the same thing for about $30 (including shipping). I don't think the dry-erase marker will work as well with these, but pretty cool nonetheless.