Twitter is the place to be. If you want up to date information, feedback, PD, or pretty much anything, Twitter is likely a great place to go. The problem with Twitter? How do you manage it when there are several hashtags you wish to follow? What about those amazing Twitter chats you keep hearing about?
Twitter. People either love it, or they hate it. Those who hate it, tend to hate it vehemently. Those who love it, swear by it. You will find a few that fall somewhere in between.
Twitter has the ability to be incredibly powerful. Using Twitter, you have the ability to reach tens of thousands of people extremely quickly. That reach can be compounded through retweets. So your potential audience is HUGE!