MediaWiki@Home is a distributed rendering project targeted for Wikimedia Foundation projects. It depends on a javascript implementation of the non-template expansion related aspects of the parser. When a user visits an article they receive a single blob containing all the wikitext with all templates pre-expanded and they render it directly in their own browser. Afterwards they push the parsed blob back to the cache.

Advantages

Speeds up the average total transaction time by 250ms
Speeds user-perceived article load time - display can occur as rendering proceeds
Provides a full WYSIWYG environment to the user
Reduces the amount of money the Foundation must spend on data center costs by reducing CPU loads

Disadvantages

Doesn't exist (yet).
Cache injection attacks by malicious clients

Conceived of by prefrontal, werdna and Splarka in #mediawiki^connect on 4-7-09