Google Chat Bot Reminder

Sometime back I joined CloudSpokes and participated in one of the challenges. The challenge is to create a  reminder service as a google chat bot. User can add this chat bot to their gtalk contacts. When a user enters a reminder say 1h Sign documents, the chat bot after 1 hour will ping back the user with message Sign documents. 
So how useful is this chat bot? People are almost online 24x7 and chat clients are used for both business and personal purposes. With this wide usage of chat services, a reminder service as a chat bot is really cool. It is making life easy as one way or the other we use some sort of reminder service.
To use this reminder service add todotaskbot@appspot.com to your gtalk contact and start using it. Type help to know the advanced features.  With this service you can create and manage reminders. If you are not online at due time of reminder then you will be sent  a mail so that you can act on the reminder later.
For developers, the chat bot is created using Google Application Engine. Source code is available at: http://code.google.com/p/todotaskbot/source/browse/
For feature list you can see: http://code.google.com/p/todotaskbot/source/browse/trunk/README.txt