I just got done watching a great webcast by Alan November. While I don't agree with everything he says I think all teachers should watch it. He focuses on information literacy and global communication. Goto http://ali.apple.com/presentation/novemberpreso.html and give it a look. It was time well spent.
I fond it by reading Jim Wenzloff's blog. You should also give that a look and if you're thinking about starting your own blog for teaching you should check out www.visitmyclass.com.