From eric cogan:

#1 http://www.meebo.com - A small upstart company that has brought trillian (http://www.trillian.cc) like features to the web. You can access Yahoo! Messanger, Jabber, Gtalk, AIM, ICQ and MSN directly through the web in a desktop like enviroment that supports multiple connections to different IM networks much like trillian.

#2 http://www.rememberthemilk.com - Another cool web 2.0 creation. If you are like me you tend to forget to do things. Also if you are like me you are connected to the world in some fashion no matter where you go (my cellphone has yet to leave my side in years). Remeberthemilk is excellent because it supports reminders via cellphones, email and instant messaging.

...via Digg