I figure since this is the official medal thread, I'd drop a note for anyone following.
The Medal system is still in beta (and just one of many new api features soon to be unleased), and has had a few hiccups as many of you have observed.
If any of the current medal-enabled games give you guys problems, feel free to PM me, but please provide as much information as you can to help us catch any problems. The hard part in debugging this system is that there is our code here on NG that handles the actual medal tracking, and then there is the game code by the author that handles the medal reporting.
One of the reasons Alkie Kong 2 has medals even though it's a shitty game, is that I coded it myself and I know for certain the medal code is installed in the game properly. If you have a glitch in any other game, but AK2 actually works for you, that would be something helpful to know when reporting a bug.
Also, please provide your full browser version (Firefox 3.0.6 rather than just firefox 3 for example), your flash player version, operating system and cpu speed.
Once we get all the kinks ironed out, we'll be announcing more details about the medal system and how YOU can plop them into your games.
Keep on truckin'