Hmm.

We definitely need a knowledge base. Not only about 'what' but who.  Most of the nifty add on tech came from the community, and the creators really need to be credited. 

Tutorials for sure: RTFM only goes so far; there is a lot of expertise that has never been documented, and if certain people die, the expertise is gone. There is a ton of data about dynamics, rigging, weight mapping, magnets, textures, shaders, maps, rendering, modeling, pipelining etc etc etc buried under the innumberable pages of fora trivia. Having a place for that to exist outside the forums would be a godsend.

Challenges could be useful, so long as it got away from 'Doing V4 new slutwear' and Make genesis work in Poser...more or less!' Bringing in figures of old, the included figures in P-10, making Bullet friendly props, how to set up softbody, things of that nature. Something to dare folks to look beyond their comfort zone and experiment. Which is how so many things got invented to get around P4 limitations. And make the prizes unique (which would be a whole other thread).