Note for those going to Houston:
I don't know if you're renting a car, but if so, and if you have time (if you can tear yourself away from the show), if you like Greek food, there's a neat place at 2520 Montrose Blvd, a little north of Westheimer, called Nico-Nico's - one of my favorites. I just checked online, and guess what - there is another one downtown at 301 Milam @ Congress, in what's called Market Square. Best gyros in town!
http://mtours.digispin.com/?sid=51223 And they do deliver! (I'm learning all sorts of stuff!)
There's also Massa's at 1150 Smith (between Dallas & Lamar) or Massa's Seafood Grill at 1331 Lamar (between Caroline & Austin).
For great Chinese, Kim Son, 300 Milam (near Congress).
Really authentic Vietnamese: Mai's, at 3403 Milam, near Francis (down toward the Museum District - just south of downtown) where the decor is super-tacky, but the food is outstanding... always full of Vietnamese people - that's always a good sign.
If you don't have a car, there are shuttles that go all over the downtown area.