I'm doing the Facebook and Twitter thing as well. Both were used for this week's Vision conference. So far, following Symantec on Twitter has been worthwhile. A couple times a week, I will spot an interesting article or bit of news that I might have otherwise missed. As far as Facebook goes, it doesn't seem like Symantec has used that as much.
I guess it is by far the most important source for business people to get to know their clients, partners, vendors... Those who think neee Facebook is personal and LinkedIn is business - think of it this way:
You want to be *social* check me out on Facebook. You want to be stiff and check what I did two years ago - ....
A very powerful tool to learn and educate others
Check out Social Media Presentation No. 200,000 you'll love it.
Not really politically correct language though !!!