Just heard this morning from the Mapquest comm team about MapQuest's new free, feature-rich and competitive developer offering - MapQuest Platform: Free Edition - the offering was announced via the MapQuest Dev blog (http://devblog.mapquest.com/).
This new offering of Mapquest's developer APIs (aka. "MapQuest Platform: Free Edition”) has taken nearly all the features of the platform and made them freely available to developers.
Mapquest also comments how they've also been rebuilding their geospatial web services platform. Starting with the 5.0 releases, the team has rebuilt much of the platform from the ground up. Currently at version 5.2 and with 5.3 in beta (available at http://developer.mapquest.com/beta/), we wanted to showcase something competitive in regards to a truly robust free offering.