A little while ago a fellow robot builder that goes by the signature of ignoblegnome (IG) did a review for me on my version of a minimalist Arduino clone designed to be used for prototyping and finished projects.  The board design allows the Hobbyduino Mini to be used on a breadboard by soldering pin headers to the I/O sockets or in a finished project by attaching wires.  IG also passed along some great suggestions for future versions.  I took the suggestions he made and modified the original design. Go here and check out the 3rd revision of the Hobbyduino Mini.