get one. fastest way to get news, imo. whether it's about the NBA/the Celtics, or about local news, or about shows or new albums or anything of the sort. it's kinda like a Google, but it constantly searches to your preferences from the most reliable sources you've allowed (usually from the celebrity or insiders or news channels themselves)
so yeah, it's great. but like anything, just don't get hooked on it. the only privacy you have is "locking" your account which means that only people you approve can see your tweets. but i don't bother. i mean, if you have a deep personal issue or whatever, don't post it on twitter. it's not the proper channel. a blog might be better for you if you wanna talk real deep.