Thanks, and welcome to the league! We enjoyed the game with you last year (despite the outcome) and looking forwward to more now that GW seems to be ready to rise again.
There is a pretty active A-10 message board here: http://www.basketballforum.com/atlantic-10-conference/
However that site frequently devolves into pissing contests between Xavier and Dayton fans. If you can prevent that, you'll have a good chance to steal a lot of the traffic away from that site. I am pretty sure a lot of GW fans have been turned off by the other message board because of that bickering, though it still tends to be an inormative site.
The other thing is that if you can coax the poster who goes by WH out of his semi-retirement and onto your site, that would instantly draw every knowledgable A-10 fan. As you will hopefully find out, his previews are one of the best things about follwoing the A-10 -- far more detailed, interesting, and inciteful than you'll find anywhere else, period. Only problem is that he didn't write this them this past year (busy with kids).
Anyway, we are happy to have VCU in the A-10. Charlotte is no less, but adding you and Butler more than makes up for losing Temple.