I've been thinking about the notifications and how should be implemented.
One option is to just do it "on-the-fly", that is, to just send a pm whenever certain event happens (when someone post on your wall or when someone mentions you on any post, etc) without any tracking or logs.
Another option is to build a separate table, breeze_notifications and when an event happens, store the even on that table, then query the table to get all the notifications and display them on the user wall.
I prefer the second option, simply because I could prettify with "real-time" notifications (of course with an option to disable those if you server cannot handle it).
Anyway, some feedback about this would be more than welcome, specially in the UI part, for example, what would be the best option to show those notifications? with a light-box, a list inside a div perhaps?