http://www.coinshows.com/grapevine_gdp.html I know they do this show once a quarter and it just happens to be this weekend. Also some more Texas shows http://www.coinshows.com/texas.html
You missed the big one. American Numismatic Association’s 2010 National Money Show™, March 25-27 at the Fort Worth Convention Center. I hope to see a whole bunch of you there.
Texmech, if you're interested in information about coin clubs in the DFW area, drop me a PM and I'll tell you more than you need to know.
Probably the biggest show in this area since I moved here 9+ years ago. The other biggie is TNA, on the calendar in May.
I went to the TNA show last year. Made the mistake of bringing my young daughter so I didn't get to stay long. Big show.