I've been out of town, and answered questions from my 6/1 post yesterday.
Anyway, here it is again: you can BYO, they don't serve any liquor. I think they serve dim sum all the time, and they are open late.
And, one more thing, if you go, make sure you get the translated Chinese menu, not the menu geared more for American tastes. And, if you're with a bunch of people, make sure you do the Chinese menu dinners for 6,8, or 10 or whatever.
Let me know if there are other questions, and I'd love to hear any feedback.