I'd stay away from an introductory column about yourself and perhaps focus on the community itself. Honestly, nobody cares about the writer, where he or she is from, or their background. If you can't show that you belong and that you've got game through the writing of the column, you'll lose people early. Your best bet is to open with a column that people will talk about and say "who the hell does WooPig2K8 think he is?" After a few weeks, if people are curious, then, maybe, give up a little personal stuff. But honestly, the best sportswriters I know of don't have to do an introductory column. They open strong with a fresh take on a well-known local fixture that makes people sit up and take notice.
Amen, brother. We are not the story. Some of the assbags on ESPN think they are (Hi, Mariotti), but, alas, they are not.
I wouldn't do an intro column. Most won't care. It won't give you a pass when a mom calls up demanding you cover her son's undefeated j.v. team.