If you're shopping on 15th street, you have to stop by LuLu Faboos. It's the cutest little odds-and-ends store I've seen. It's kind of hard to find - look for it behind LaDonna's fine foods.
It's full of "gag gifts", as well as unusual trinkets for the hard-to-buy for. Every time I walk in there, I find a gift for someone, and usually the person who's hardest to buy for!