t.imo.im – Instant Message with Twitter Users
https://t.imo.im/

With t.imo.im, you can instant message easily and securely with other Twitter users. It is an experimental project brought to you by imo.im. They are experimenting with combining Twitter and instant messaging. t.imo.im is still in an early phase, so please give them feedback on suggestions and bugs by either tweeting @imoim or emailing feedback@imo.im. They are also looking for power users who would like to test out new releases. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.