I just noticed this website which recently launched an altcoin payment processor: https://coingateway.net
They plan to build an interface between merchants on cryptocurrencies (similar to shapeshift I guess) and continue to add more coins to their service. I just wrote them an e-mail and asked them kindly if they’re interested in adding NuBits.
I think payment processors are very important for NuBits, especially if they offer the possibility for merchants to hold the coin.
EDIT: They just replied to my e-mail that NuBits is already on their list :)They confirmed it with this tweet: https://twitter.com/CoinGateway/status/562079086009659392