I can be IMed under the screen name "eikonoklastic" on:
yahoo
gtalk
MSN(@hotmail.com)
AIM
irc (freenode.net).
I don't chat much anymore (life has a way of limiting such things), but I sometimes leave a chat client on while working at my desk.
Email is a more reliable way to reach out and touch me, though: "rml" at this domain
Skype or Twitter: eikonoklastic