I understand Devcoin, but I really don't see this currency taking off. There's no incentive to use it. There's no sound monetary protocol. And the market clearly does not see it as any more advantageous than other currencies.
I get the ethical standpoint, but again, as a developer or creative artist, the question remains:
Why demand devcoin over bitcoin?
It's a free market, so you can demand whatever you like, even fiat if you prefer. When you earn devcoins as a developer or writer (from generation shares), you're making a trade with the project for your work. Asking for devcoins outside of generation shares is really personal taste, and ultimately since coins are so easily interchangeable, it doesn't matter what coins you accept. That doesn't detract from what the devcoin platform is trying to achieve, however.
Due to the non-halving block rewards, it suits trade purposes far more than saving purposes, so it's a good earning coin compared to bitcoins, but not as good a savings coin. That being said, there are plenty of hoarders of devcoins, too, but they would be considered investors rather than savers, because they're investing in other people working to create value. It's a coin that essentially mined by human work, and not hardware (but is secured by merge-mining from the bitcoin network, so they're entwined; if that goes down, devcoins go down too).
The administrators are currently focusing on building businesses that convert profits into devcoins, to store in a community fund, such as
http://devcoinauctions.com.
http://devtome.com also converts advertising revenue into devcoins, but so far it has been distributed to writers - at some point in the future either the share subsidy will stop and the ad revenue take over completely, or ad revenue will end up going to the community fund also.
Regarding prices: eventually, if the community fund takes off, and enough businesses develop to produce enough profits to contribute to the it, the supply of coins produced per block (50k) will be less than the demand in fiat/btc, at which point the price will start catapulting. The ethical part is that every single business developed by the community will be open source based, and freely copyable by anyone. As to whether they contribute to the fund is up to them, but $1M /month flowing into the fund would pretty much guarantee a price of 0.5 cents per devcoin (currently its about 0.001 cents per devcoin), and in practice will probably be higher. Setting up these businesses are generally subsidized by generation shares, but what they give back is up to them. As long as they proliferate open source, then the coin has been successful in its mission.