Jake of the Web Time Wasters And Then Some

Instant messaging without downloading software

www.meebo.com
Instant messaging site that allows you to access yahoo, msn, aim and google talk all at the same time through a website – no need to download software.
This is great for people who travel or use computers that they are unable to install software on.
There is a feature that allows you to embed a meebo chat window into any webpage you create – I think that's perfect for a myspace page or other social networking page (that is restricted to friends only).