DeVCoin uses bitcoin addresses but GRouPcoin uses ones slightly offset I think, so that they typically start with a 2 instead of a 1.

Though maybe that is just my luck of what addressess I have generated if maybe bitcoin/devcoin addressess can sometimes start with a 2 ?

I suspect though that with GRouPcoin we prototyped how we would go about changing the address system but then ended up deciding that for DeVCoin proper it would be better to use BiTCoin addresses to make it easy to use people's existing donation addresses.

-MarkM-