I'm currently working with extensions development at this moment, and as a part of one my freelances I've done a Newgrounds medals for a friend that asked.
As I've seen that the older Newgrounds Flash extension doesn't work anymore, what's the interest for a new updated version of it?
Also, there are many extension API's that I believe are not yet implemented/or are outdated (Kongregate, Armor Games, etc..)
If you're interested, would you buy it? Which API's integration you have more interest?
For information, I'm up to develop extensions for either HTML5, Flash or both.
I'm raising the current interest and thinking about developing and putting the extensions for sale on ClickStore, but I'm open for any kind of offers.
In any case, just reply to this post or contact me via PM.