I should say: "I love the internet" really. But, Facebook is particularly cool. It's helped me reconnect with a few people lately and I'm grateful for that. It's just a shame that not everybody uses it. ;)
In addition to reconnecting with people, it can also be useful to know what people truly think... Interesting what the status updates can reveal about people and how some of their conversations there teach you one thing or two. I think some people would be well advised to think twice before they write anything online.