Just a quick announcement in case you missed it on Twitter or other blogs: Macworld Expo '10 will have an online "Indie Developer Spotlight" in which any application that is discounted for 20% off can be listed on their "indie list" page during the expo, between February 11 and February 13.
Just go to this page and get yourself signed up. One note: you will need a URL to visit, not just a coupon code. (For Sandvox, we were able to supply a URL to our store with the coupon code pre-entered.)
It looks like it's not too late to get a stand at their Independent Developer Pavilion — what some call "Tiny Town."