I think it would be a good idea for jme developers to post a list of features, effects and stuff, that they wish to add to jme, but don't got time to implement. There are probably many users out there that might have implemented that stuff already and wish to give something back but don't know what.
And even if users haven't implemented it, some might take a look at that list and maybe implement a missing feature in order to contribute.
Call it a "JME developers wish-list to users".
Nice 