Here is a fascinating and useful service; Sabifoo. Add the Sabifoo botto your instant messanger contact list. Send it a message and it creates an RSS feed as well as a web page, structured like a blog. No other setup is required. No usernames, passwords or email addresses. Just add and start sending IMs to it. Very cool idea.
I see it working best for personal lists and quick note-taking.
Still on Sabifoo it shows an interesting form of authentication. By using your IM to send commands you are veryfing who you are. You have logged into your IM and so any messages to Sabifoo are coming from you. Nice idea.
