The best Specialized shop will be Bicycle Sport Shop central. I LOVE BSS, they are the shop I use. It is big but locally owned and have super low turnover. Their owner is in the Mountain Bike hall of fame and can often be found in the shop or out at local races (racing!). I just bought my Gary Fisher HiFi from their north shop but the central is big and has a great staff my husband knows from racing mountain bikes.
Right by them is Jack and Adam's Tri Shop, down the road is Austin Tri-Cyclist and a short jaunt is University Cycles, Freewheeling bikes, Mellow Johnny's.
Mellow Johnny's is cool but I sent one visitor there and she thought it wasn't worth the hype (but still appreciated the suggestion). She is a regular poster here but I won't rat her out unless she weighs in.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan