Network: LJ Talk, but access from other Jabber-based networks, including Google Talk.
...SMS:
...VoIP:
While I have the Gizmo Project client installed, I usually don't have it running, because I have no one to talk to. If you think I should be talking to you, let me know. NB. I have no intention of running Skype.
...Mobile phone, SMS or postal mail:
These real-world contact-details are held in a locked journal entry, which is accessible to people I trust. If you think you belong on that list, let me know: any OpenID or LiveJournal account can be used to log in.