I tried it, everything seemed to compile after adding a couple of “const”s to some of the library definitions, but I couldn’t get it to upload.
There’s a new Sanguino board definition here: http://lauszus.github.io/Sanguino/ that I installed and was able to select it in the IDE, and I modified the boards.txt file to have right right upload rate, but it’s still giving me the “stk500_getsync() not in sync: resp=0x00” errors.
Which type of programmer are you using, and which firmware are you using? (That is, if using Arduino-style bootloader firmware, is it one based on the v1 or v2 firmware?)