lamar i think tom announced or ashley ... not sure which i read something quick yesterday, in a post they did, they will take care of arcade, and have a lot of ideas how could it be developed, but at the time their focus is on C3 release and development!
i see your point, but then someone said above, i think if not in another post, easiest would be to create a arcade page and let people submit their games and then u could sort them based on quality.
i had this arcade thing going a few years back i was using arcadebooster website suite, its very effective, simple and beautiful, plus if u know some mysql and html5 u could turn the free theme in a gem.
however then would come the problem of mass marketing or pitching the idea to C2 developers or game developers in general, but at that point you would make another gaming portal. so are benefits and struggles on both parts.
for now personally im just taking a break from C2 till all C3 arrives. (has some features that make more sense, but there are downsides to it also, probably,and im not talking about payment system here, more about compatibility of C2 community developed plugins and C3 support/transition.)
just a idea, the best C2 arcade games, are also available or posted on newgrounds and kongregate just embed them from there.
Edited: wow nice tutorial! im intrigued and slowly pushed back into the gaming portal hahaha... for some reason(i guess was fun tweaking at it all day and micromanaging it).