Dashboard-like view of all new notifications from all applications. Is there such an application?

For osx specifically?

at my work I am up moving around, and constantly need to be aware of new skype activity, adium activity, mail messages, why not throw facebook and twitter in there too. To check these I scan my menu bar and then have the dock pop up to look for any red badges that indicate new activity.

Is there an app that can come on- somewhat like a screen saver, but shows all new activity from my applications as it happens? So that I can see from accross the room?

Ideas appreciated!