I have a twitter account, but I rarely post anything. personal milestones that my friends and wife MIGHT read... I think most of my followers are parts dealers or porn sites.
It's cool to follow racers' tweets during a race weekend, but lately all I get are updates about Melissa Paris's leg rehab, Tommy Aquino's new Yamaha 450, or the Bostrom brothers' mountain biking. Not that i find those un-interesting all the time, but I prefer the racing info.
I used to subscribe to OnTheThrottle.tv, but they post too often. It would literally be 40 messages in an hour some times (just annoying to delete them all from my phone).
At work, we tell our franchisees, "you NEED to have a twitter page for your business. You NEED to post something at least once a day - but never post more than 3 times a day, and definitely never more than once an hour."
Our marketing person tracked people's habits, and if you post more than twice an hour, or more than 3 times a day, you start to lose followers (at least in our target market).
