Although I wouldn’t use the term “disclaimer”, I do like your proposed text on the Exchanges page. The market peg stability would be a nice additional branding point to reinforce.
I don’t think it’s necessary to specify which exchanges the NuBot is running on. A major website principle I want to adhere to is simplicity. There’s a reason why Bitshares is nervous about their marketing, and it’s because newcomers to their website are overwhelmed with options and data.
Natural arbitrage will take care of the market peg on any exchange or trading pair that we don’t support. If anything, those arbitrage opportunities for traders on NBT/BTC and NBT/PPC are an attractive way to continue to generate trading volume for us in a risk-free way, once the NBT/USD pair is the only one supported by shareholder-funded LPCs. Hopefully LPC’s will be able to move to USD-only trading pairs in the near future.