I'm really interested in establishing a network of online teachers that we can all turn to at almost anytime of the day for questions or help. Twitter and Plurk both work well for this, and while I have a large network of education technologists that I communicate with regularly, very few of them are involved in e-learning. So, if you are interested, please post your Twitter or Plurk ID's to the forum.
I am @petef on Twitter, although I'm not a teacher myself. If you are interested in using Twitter in this way you might also be interested in a tool we will be launching soon called HTH. Instead of your posts only being seen by the people who are following you you can post on a particular topic and it will be seen by anyone who is following that topic.