Killerstorm,
Could you possibly outline the differences between your implementation and the CoinPrism one?
Also, I've got some trading services I'd like to explore - will you be releasing an API for your colour implementation? That would help me choose between ChromaTokens (?), CoinPrism (no API) and CounterParty (has an API).
Thanks!
Chromawallet is a wallet and a server. It uses JSON instead of an API because it doesn't run on a central server. Others running the client will have to import your short JSON script to see your bids/asks. It would be cool if a central exchange like Counterparty would add Colored Coin to their API to do that for you.
Coinprism is like Colored Coin, but runs on an Open Assets server, which is not open source yet. Chromawallet is open source and needs folks to run colored coin servers along with their Bitcoin nodes.