How to find an embedded platform?
I don't know of a exact match for this spec, but there is some quite nice embedded Linux cards out there that may fit your need. 

Just have a look at this page: chiphacker.com - options-for-a-small-linux-hw-platform

A bonus of using Linux is that you could use most languages, but I would recommend using C or C++. Maybe Java if you can find a JavaVM port for the hardware you select. 

You could even use pascal if you feel like it (see http://www.freepascal.org/), 
but I don't think that it is a good idea...