I have just started using Twittter at work.
I've had a personal account since 2009 which i mainly used for communicating with friends. A month ago i changed my profile so its almost exclusively for work now eg changed my bio, photo, interests, stopped following Paris Hilton and statarted following our customers and other Unified Communications suppliers!
However...I'm not sure if I'm convinced. On the one hand its a quick, easy and most importantly, totally free way of getting your brand out there to potentially thousands of people (at present I only have a measly 150 followers but I'm working on it!)
But on the other hand I'm just not sure its worth it for a medium sized company like us. Are people really reading my tweets? If i posted a link, for example, to my companys website would anyone actually bother to follow said link?
I'm going to persevere with it for the moment as like i said its free and I can do it on my phone on the bus on the way to work!