Select2 is this thing here: http://ivaynberg.github.com/select2/
It's very, very nice for making large selections more user-friendly. I intend to upload a JQuery plugin for it.
-- JanKrueger - 04 Oct 2012
Added some modifications in an Item12116 branch. I'd like to see this extension released soonish as I've got some others depending on it now.
-- MichaelDaum - 29 Aug 2014