Team milestones, Badges from projects, congratulations to members regarding personal achievements (such as User Of The Day project awards, or reaching specific targets). Also topics about GRC (Gridcoin) rewards.
I noticed I got 100 last night (that's officially 100 - no messin'!!)
Anyone can get a UotD. Just make sure you have a profile and picture/image on as many project sites as possible. They're selected randomly but only if you have profile and image.