My old Ludum Dare 28 Entry; here:
http://www.newgrounds.com/portal/view/630626
Has been updated to have scoreboards and medals. This wouldn't be that notable; except that it's the first Unity game to have them. Submitting mostly as a first test implementation of the Unity Newgrounds (uGrounds) API as is; not really trying to bring more people to this game (it's not that good, it was ambitious for 48 hours; but not that good.) Nonetheless; I do encourage people to try to get high scores and medals in the game, if for nothing else, to see if you find any bugs I don't know about. Scores should be sent first (upon finishing the level it sends the remaining time to the server); medals should unlock not long after loading the next level (or seeing the end screen on the final level). This implementation is rudimentary, but it worked for me.
TomFulp
I completed level one and didn't notice a medal notification in-game, but when I refreshed the page, the medal was indeed unlocked! Woohoo!
Bcadren
I haven't made an in-game notification yet. I can't exactly just drag and drop the flash one afterall. Sprite-based would be the easiest way to look like the flash version, I think. *does a quick sketch*
To make a popup that looks like the flash default it'd need to be roughly this:
http://i262.photobucket.com/albums/ii113/Bcadren/sketch_zps1798d2ae.png
Not sure if/when I'll get around to making that; I probably couldn't be the sprite artist for it (wouldn't make something that looked that much like the original unless I literally ripped it (recorded the popup popping up).