I always hoped that poor fellow ended up ok after that. My gut tells me that no one ever heard from him again. I don't think any other photograph defines courage as much as that one.
As for the business restrictions, what can you do? I do admire companies like Google that can take a moral stand against Beijing's censorship.
I gather that what happened to him has grown into something of an "urban legend" of sorts, with some saying he was summarily executed and others claiming that he lives peacefully in Tibet, etc.