I like where you're coming from....
Astropedia, but as you say... no brands, just individual pages for say Kellner, Plossl, Adaptive optics, Mono CCD cam, OSC CCD Cam, DSLR astrophotography, Flatteners, Tele-extenders, reducers etc etc etc..... I like.
What they are, how they're used, how they're NOT used... tips, tricks, etc etc
We certainly have the knowledge around here, myself excluded!
Only problem is... seems to be a lot of people(seems global, not just around here) that dislike wiki.