Easier Than I Thought
Medians are roughly implemented in the assets viewer and there are no more direct calls to eve-central. Instead, the code retrieves the static median exports from my price system and loads them into a table. This is not automated or scheduled in any way at this point, it’ll require manually running process_median_xml.php whenever you want fresh medians or scheduling that script to run daily/weekly/whatever. It also allows to retrieve medians for all of the regions or any single region and lets the user choose the region to get prices from - generally The Forge will have the most data and the least chance of really wacky prices since volume is so much greater in Jita and surrounding areas.
You can check this stuff out at the live beta site. The code that powers this should be available in the nightly when it generates at approximately midnight CST (-0600 GMT). There are probably still some rough edges in this code.
It also requires a few changes/additions to the database, so check out import_extra.sql for any new tables that you might not have if you install this newer version.