http://instacss.com
(in case DNS update hasn't propagated: http://morning-warrior-3377.herokuapp.com/)
Last night I was annoyed at how slow (and web 1.0-ish) most CSS reference sites seem to be, so I created this. It's basically a scrape of the CSS reference on w3schools, but with client side searching. Feedback is most welcome!
some of the tech involved: node, requirejs, backbone, mongodb
the code: http://github.com/rgarcia/instacss
You could use Levenshtein distance (https://en.wikipedia.org/wiki/Levenshtein_distance) as your search metric. That would provide two advantages: it would handle slight misspellings, and it would find the closest match first ("radius" would prefer "border-radius" to "border-top-left-radius", and "border" would prefer "border" as requested in another comment).
You might consider providing a quick list of the property names (perhaps over on the right) in addition to the fully expanded list, to make it easier to tell if you have the right results, and jump to them in the list.
Please put the "[source]" links closer to the content; right now they seem more closely associated with the following entry. How about putting the link near the top right of each entry instead?
Please don't fade the "default" and "inherited" text so close to white; I found it uncomfortable to read with that little contrast.