Soon NASA will be taking requests from the public for photo targets from the Mars Reconnaissance Orbiter (MRO). The MRO evidently can take pictures of objects about the size of an 'Easy Chair' from the orbit of Mars. They accomplish this using the High Resolution Imaging Science Experiment (HiRISE) which has 14 CCD chips. This camera can take pictures having 300 times more pixels than an 8 mega pixel camera Check back with NASA for updates on the submission process.