I know what you nedd - http://JoDo.im/
HIERARCHICAL TODO-LIST DIRECTLY IN THE MESSENGER
If you are using the IM-client for Jabber (GTalk, Miranda, Kopete, QIP, etc.),
you can create and manage the TODO-lists directly from the chat window.
To create a list add email@example.com in your contact list.
To add a task to the list write to this user:
+ name of task
[description of the task]
The square brackets indicate optional.
In response, we obtain:
Task 1 is created.
Where 1 - is the number of this task.
To create subtask:
[description of the subtask]
Listing all tasks:
Mark task completed:
#ok number [comment]
Other commands can be found by typing #help
You can create any number of such lists for each area of life.
Jabber-clients there for all platforms.
Thus we are able to quickly work with your ToDo directly from the chat window.
Service is free and has a web interface is available after registration with command:
#register your_login your_password your_email
If you do not have an account on any jabber-server, then you can get it on the same server.