Just got my long awaited super micro R/c model rock crawler on February 2011.  Its YOKOMO NANOQLO model.  This thing is the smallest r/c rock crawler in the market period!  I think its around 1/45 or 1/50 scale! As small as credit card size.  Its 4WD motor on axle, superb axle suspension articulation, full proportional control (except for laggy steering servo), run on 1S lipo config, around 10 minutes charging and average 40 minutes of runtime.  This thing rocks for small scale crawler. Fit in the pocket and definately always have time to play round anywhere.  The model, controller and charger easily fit inside my baggy pants pocket!  Before i run my design project i always play around on my custom rock crawling track just to keep my mind sparked.  Awesome stuff!