An update to the analysis at the link here: http://www.julienlecomte.net/blog/2007/08/13/
----=== Expected best compression rate ===--- Uncompressed jquery-1.2.2.js = 93.1 KB Compacted with latest release (2.2.5) of YUI Compressor = 52 KB After Apache/2.2.3 (Red Hat 5) mod_deflate GZIP compression with highest compression settings = 15447 bytes ----=== Unexpected best compression rate ===--- Packed jquery-1.2.2.pack.js 28.6 KB After Apache/2.2.3 (Red Hat 5) mod_deflate GZIP compression with highest compression settings = 14655 bytes ----=== Bottomline ===--- If you have a fast server with Apache's mod_deflate maxed out then use the packed version of JQuery and save your users the effort of downloading an extra 1000 bytes. Running now at http://www.t1shopper.com/voip/