The only device I can see on the market that will give you this is using the Sonnet Tempo Thunderbolt to ExpressCard adaptor and then use a USB 3.0 ExpressCard. This at least proves that it must be technically possible. If I use one of these though I won't be able to connect to a screen at the same time - unless I'm missing something. Is there sort of technical problem with Thunderbolt tripping company's up on this. I've been waiting for about a year for someone to bring something to market and no one has. A couple of companies have been sporting pictures of thunderbolt docks for many months now but nothing tangible has come from them. What's the problem? There must be problem because there must be a massive market just waiting for one of these.