Ann Arbor based Protean has raised $5.8 million in venture funding, and has officially re-branded their blue tooth enabled payment system to “Stratos”. The goal, Co-founder Thiago Olson says, is to help reflect where the company is headed to next. “It reflects the strength and universality of the vision,” said Olson. “We’re connecting a dumb piece of plastic to the cloud; it has ties to the cloud infrastructure that we’re building.”