Eh, I started it but it was pointless. The only followers I got where from a few sympathetic fellow sellers, but they aren't exactly the key buying demographic you need to reach out to, and My shop's not big enough to get any number of buyers to click "Follow".
Honestly, they call Twitter a social network, but I don't know anyone who actually uses it to keep up with friends. All of your conversations are public and so is everything you post. Along that I believe for every one social twitter account there are three business/celebrity promotional account. My niece spends hours on that thing trying to get (what she call's) a "Virtual autograph", which is, from what I gather, a reply, retweet, or get them to follow her.