Thing 7 Web 2.0 Communication Tools

I think I've got all of these down already. I use Meebo and IM at work on a daily basis, I have a Yahoo email account, and I use text messaging on my cell phone (just occasionally since they charge me $.15 per message). I have already set up a Meebo Widget from my blog so people can IM me right from my blog. As far as all of these tools go I think that IM, and of course email, are great applications for libraries. I have to admit that in most cases, I will send someone an email before I would pick up the phone to call them.