I'm going to go ahead and give you my feedback, since everything else here is nonsense crap.

I think it's a great idea. I've definitely wanted something of this sort for a while now. A notification system that alerts me when someone has written on my facebook wall, messaged me on meebo, replied to my HN comment/submission, posted a blog post, etc - a consolidated system. You should start integrating it with more services and give users the option the to pick and choose which ones they want to use your service for. I'm not quite sure how feasible that is from a technical standpoint, but from a consumer's point of view, that flexibility to hook my various services into a consolidated notification system would be awesome.

Good start.