I believe one of the founders of Booking.com has had some similar experience (source: "De Machine", the book about Booking.com) and after 4 years of travelings & yoga etc. he sneaked back in into the company. Most of his coworkers do not know he's a founder. He's been fixing Perl bugs, writing scripts and coding some features at least for some years (maybe he's moved on already, don't know, the book is a couple of years old).
Sounds like a great book. Did you happen to read it in English? Ask because my brief search for it shows at least one review saying it's a bad translation.
