I don't think that there's some merit in contacting the adcom, and if you do, certainly don't contact them frequently - they're ridiculously busy with admissions. The only reason to contact them would be to make sure that your app didn't get lost, or update them on a very significant event (but even that's questionable). That said, with electronic submission of apps, well, do you really think it will get lost? No, it won't, so I'd suggest not bugging them. As for contacting them if your'e waitlisted, however, that's different, but we're not addressing that at this time.
Unless something huge has happened in your life, the adcom should have more than enough info from your app to determine whether or not to interview you. Good luck! I can definitely say Booth is worth the time and effort. I can only hope that I'll be contacting some of you in just a few weeks.