http://www.w3.org/wiki/Open_Web_Platform

Unfortunately seems to be member only, though
http://www.w3.org/wiki/HTML_Wiki:Community_Portal
indicates others could help.

A wiki for XSLT? Mathml? SVG?
Sounds good to me.

-- 

regards 

-- 
Dave Pawson
XSLT XSL-FO FAQ.
http://www.dpawson.co.uk