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It would be really awesome to show usernames (with links to profiles) in orderbook. Kinda of social exchange.

Does it connected to testnet or mainnet?

Real block chain.

Slick, when it going online?

According to the white paper p. 45 it says direct conversion would not be possible to prevent timing attacks. A real market is also discouraged see "Minimizing Abuse of Conversion".
When searching for internal market I could only see posts describing your option 2. It seems like I missed something.

Do you know where I can read more about this?
Also could you send on the console and console command if you have it?

Conversion != selling on the market: through conversion you increase STEEM supply and destroy SBD supply, but through internal market - not. On internal market you buy or sell what is already exist.

I got my questions answered in slack:
The paper talks about blockchain conversion while a market of steem <-> SD does not offer abuse of conversion. Abuse of conversion: Trading large volumes without changing the price.
Direct conversion of SD to Steem move sd and steem around while option destroys them. The internal market seems to be a new feature.

Internal market has existed since launch. Just no steem dollars to trade yet.

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