From http://www.bitsharesdemo.com/drupal7/
Pay with Bitshares.
Needs to be specific "BitShares BTS" or "BitShares bitUSD" etc.
Should the logo include "BitShares"?..
All plugins will accept bitassets, anything preceding a Bit.. BitUSD, BitGBP, BitSLV BitXXX
Aslong as the currency used by the system matches a BitXXX equivalent its a valid form of payment..
Logo's are extra for demo... these are not necessary for functionality of a payment gateway... its just extra work I can put in later to make the sites more demoable.
The term "Pay with Bitshares" means you can pay with the Bitshares decentralized exchange.... You don't want to specifically mention bitusd because there are other fiat currencies out there used. Maybe a special logo "Pay with Bitshares" and under it mention of bitusd, bitgbp, bitgld, bitslv with symbols will be useful as a banner.
Kinda like paypal has with Credit card logo's under pay with paypal.