Judging by the user comments, Fabrice Grinda has been one of our most popular guests. We interviewed him last December on his last day at work at Zingy, the ringtone company he founded, sold for $80 million, then grew to $130 million in sales. Before Zingy, he started the leading auction sites in Europe and Latin America.

We can now break the news of his most ambitious venture yet: An ad-supported auction site to compete with Craigslist and eBay. It's called OLX, and it's already live. We grabbed him for a text interview to give us an update.