[quote]For example a page on nuclear energy, giving a brief intro and then explaining who uses it and how it's standard or even low tech in this setting.[/quote]

The idea is solid, but this is one step away from Kardashev-style technical tiers that will only be given legitimate worth by a handful of player nations that effectively set an extremely inconsistent technological standard for "advanced". I'd argue antimatter reactors are innately inferior to thorium fission reactors or fusion reactors due to their need for active containment units that, should they fail, will result in the utter destruction of the reactor and anything within an X mile radius, but I doubt anyone cares about any of these factors because the superficial Space Opera standard can easily be invoked as a suitable (to me: sloppy) counterargument. 

Stick to submitting your nations to the wiki. Leave out the categorizing.