I signed up for Twitter. Twitter sounded pretty meaningless at first, but when a friend of mine told me she was on it (thanks, LB!), I decided to give it a shot. The best way to describe Twitter is that it's like an RSS reader where you get only the summaries. You have to 'follow' people in order to get their updates (their posts). The updates are limited to 140 characters, so many people use tinyurl.com or bit.ly to shorten their links, so you have to click to know where the link heads.
There is also a search feature on Twitter. People who have posts specifically relating to a certain topic will include a tag. For homeschoolers the tags are #homeschool, #hsc, and #homeschooling. You can search Twitter for those tags to get a quick low down on all of the homeschooling related updates. I've found some interesting links and ideas.