Blogdex uses the Apache::ASP perl-script as a scripting engine to build its various dynamic pages. While browsing the configuration variables for another project I'm working on, I noticed a peculiar setting I hadn't seen before: CompressGzip.
By switching one variable sitewide, most pages on Blogdex will now be sent compressed. It's not such a big issue for me since MIT provides me with nearly unlimited bandwidth. However, with a nominal amount of CPU all of Blogdex's content should transfer about 4 times faster than before (I benchmarked the compression using the ISAPIZip online tool). Enjoy.