While still in beta (which, as you know, is the new black), list management/reminder site Remember the Milk has become quite a player in the Web 2.0 productivity game. It offers plenty of very slick features, including a mobile version, SMS capabilities and (of course) tagging.
The Republic of Geektronica has a very informative post dealing with RTM as a GTD tool that gives a solid overview of his implementation. The fact that it integrates with Google Calendar is pretty awesome, but until it can talk to my Moleskine Diary… 
Technorati Tags: remember the milk, web 2.0, gtd, sms
Written by Brett Kelly
GTD