Global task list

Everyday i think that there is one good software which can help me setup my tasks.

Some are overdone with tons of features which very less people use. Others have no interaction or are in limited capabilities.

What is required is an easy, simple but available across all the platforms. A task list which is available on IPAD, IPhone, Blackberry, Android, Other Mobile Phones and PC over the web.

Idea is that wherever we are we should be able to add the tasks or see the tasks. There may be sometimes when a task need not be associated with a date or time or any place.. it could be a simple task for me like to take medicine or call up someone today..

All devices should have single logon with sync feature to sync in real time. This could be a real simple, easy to use and a great app which can have a large audience.

There could be additional features like mailing the task list or a task to someone, or forward as SMS to someone.. but not many many features.