Remember The Milk

Remember The Milk is a tasklist site that keeps track of your to-dos.

You can use tag clouds or lists, and receive reminders via email, SMS, and instant messenger (AIM, Gadu-Gadu, Google Talk, ICQ, Jabber, MSN, Skype and Yahoo! are all supported). Carrier-pigeon and smoke signals still in the works. 

Pretty neat. Now if only the lists could make themselves...

(From Guy)