Zirrus: web based to do list done web 2.0

Zirrus "combines cutting-edge Web interactivity, the power of tag clouds, and the simplicity of a whiteboard to provide a fresh approach to task management that will appeal to the busy, the scattered, the organized, and fans of the Getting Things Done approach to life management."

Features include web-based to view tasks from anywhere; a fun "Braindump" list that includes all your tasks; categories, due dates; priorities and a task cloud that is color coded by tag and sized by priority.

A good look and feature-rich task manager, worth a look.