To start, I moved all of the existing API documentation to the EVE-Central Wiki. You can find documentation (with less typos, etc) here:
Next up, I’d like to highlight two new APIs:
quicklook on path
For a single market type, get all of the orders which lie on a path between two systems.
Get the route between two systems as the auto-pilot flies (mostly, kinda)
You’ll notice that the route API is returning JSON. I will be upgrading the other APIs to emit both XML and JSON for convenience.