it took a week to complie your avr-cdc source code.I understand 2313 code added "!".i had successed to using your fix avr-cdc upload sktch to mega8 under arduino ide.very fun! very interest!
my next plan is improve ardublock,but i output ardublock.jar can't be using.can you compile ardublock source code?if you had finished,please ask me.
my e-mail is sunke_76@qq.com,wish your contact.
thank your share.I am your fan.