NextAction! - Getting Things Done on Windows Mobile

""NextAction! for Windows Mobile" is a lightweight task management application which was designed according to the principles of David Allen's Getting Things Done (GTD® methodology. It helps you implementing GTD with your Windows Mobile device, bypassing the shortcomings of the internal Task/ToDo application. NextAction! fully integrates with the internal Windows Mobile task database and therefore synchronizes flawlessly with standard desktop and corporate environments. NextAction! for Windows Mobile costs $39.95"

If you are one that sticks to the GTD methodology and want to carry that around on your phone, you should check out this app. It works with Windows 2000/XP/Vista - and I assume Windows 7 but that isn't confirmed, and will sync with Outlook, Lotus Notes, Act!, groupwise, iCal and Entourage.