App idea: Presence

Tell me if this already exists so I don’t waste my time! I’d want this feature for another app I’m writing.

This is a mock iTunes App Store app description:

Presence lets you control an online service where you can set your global status (Available, DND, in a meeting, sleeping, etc), which can then be polled by any third party, e g to determine if it’s okay to push a notification to you right now.

Choose between default statuses, or make your own. Customize each status to what you are okay with receiving in that status, and whether to push that status change to any of your services (e g google talk or msn).

Also has the ability to set your status on a schedule (e g set to “Sleeping” at midnight and until 8 am).