He is an economist, taught last year at UT Austin, and is now the new finance minister of Greece. You can find him here on scholar.google.com. And here is his 2011 proposal for overcoming the euro crisis, another version of that here (pdf). Here is his blog post on the Scottish Enlightenment. Previously he was working as an economist for Valve, a video game company. Here is Yanis on EconTalk with Russ Roberts. The discussion of Greece and the eurozone starts at about 48:22.
His blog is here, he claims he will continue blogging:
The time to put up or shut up has, I have been told, arrived. My plan is to defy such advice. To continue blogging here even though it is normally considered irresponsible for a Finance Minister to indulge in such crass forms of communication. Naturally, my blog posts will become more infrequent and shorter. But I do hope they compensate with juicier views, comments and insights.
Here is a good Telegraph profile of the man. Here is his Wikipedia page, and here is one excerpt:
In 2005/6, Varoufakis travelled extensively with artist Danae Stratou along seven dividing lines around the world (in Palestine, Ethiopia-Eritrea, Kosovo, Belfast, Cyprus, Kashmir and the US-Mexico border). Stratou produced the installation CUT: 7 dividing lines, while Varoufakis wrote texts that then became a political-economic account of these divisions, entitled The Globalising Wall. In 2010 Stratou and Varoufakis founded the project Vital Space.
Stay tuned, this will be fun.