Just when you thought the party's over in Internet-enabled e-commerce, Vamedis is staking a claim for leadership in Europe's B2B supply chain space. Over the past year, the European marketplace hasn't been much friendlier to dot-coms, particularly B2Bs, than the US marketplace has been. But far from a venture-backed start-up, Vamedis is banking on leveraging the entrenched market positions of seven of Europe's leading hospital supply companies.