Just ran across a new (to me, may not actually be that new) tool that purports to evaluate Wikipedia's "trustworthiness". It's programmatic (comes from the University of California, Santa Cruz, computer science department) and shows trust levels in actual Wikipedia article text as color (the more orange, the less trustworthy).
I'm not saying this is an inerrant tool to detect bullshit, spin, etc., in Wiki-articles. This is still in demo form, and doesn't operate "live", but uses an archived dump of the "encyclopedia" dating back about a year. It does seem interesting, though, and who knows? it might be of some use to those fighting the Evil Empire. So look at it (Wikipedia trust coloring demo) and discuss amongst yourselves as I know you will. (Note: the site seems to be extremely slow. Apparently they don't yet have the deep pockets of the Florida-based enterprise.)