I changed a little the original core files to add support for te 4313 (on the 2313 base)
after creating a board.txt entry for my tests, i've been able to compile the blink setch and it works
With the library BroHogan published?
Yep, BHogan TinyWireS lib as documented above in Reply #28.
just to add a basic support i've changed the 2313 ifdefinitions like this:if defined( __AVR_ATtiny2313__ ) || defined( __AVR_ATtiny4313__ )