I didn't know there was a term for it, but I've been running a "startup studio" (http://prontotype.us/ http://prontotype.us/) for the last two years. Our terms

I didn't know there was a term for it, but I've been running a "startup studio" (http://prontotype.us/ http://prontotype.us/) for the last two years. Our terms are a bit different - we take only take a minority share and don't (currently) work on the marketing side of things, but the concept is the same - building software for early-stage entrepreneurs to validate their idea & market.