Instant Messaging
The best way to reach me is via Jabber (XMPP) / Gtalk to halr9000@gmail.com. Don’t forget to use Psi. 
If you are Jabber-challenged, I am sorry for you. You can still reach me via the AIM or Yahoo networks, my nick is “halr9000″. MSN is halr9000@hotmail.com.
You can use either hal@halr9000.com or halr9000@gmail.com. Doesn’t matter, they both go to the same place. (In case you are curious, I get 30,000 spams in my spam folder a month. Only about 3-5 a week get to my inbox though!)
While I do login to Google Talk, I don’t use the Google Talk client itself (I use Psi), so you can’t reach me voice that way.
Social Networks
Plug my email address into these social networks and you can connect with me that way.
Voice
I hate talking on the phone. 
If you really want to talk, you can hook up with me on the above social networks and then you’ll see my cell phone number in my profile.