I'd start posting on Houston craigslist...and get your website address out there somehow.
Tell people they can post their resumes, advertise jobs for free, etc.
Go to other Houston forums and post there...just google houston forums...get active on other mom forums
Post questions in your forums or start controversial threads like "Obama is dumb for saying he wants to kick a$$...what do you think?"
Start threads on your forums asking peole to lsit their favorite....book, ice cream, etc
Highlite Houston businesses like best places to eat, best flower shop, best place to get your hair done...blah blah blah
Dont just sit back and wait for others to comment, start the comments yourself and make it controversial...that keeps people interested and coming back...