It's difficult to persuade hundreds of thousands of people outside said garage to write the actual content.
Two guys in a garage can create a wiki. Two guys in a garage with a million dollar PR budget can create a wiki and get it widely publicised. Two guys in a garage with a fifty million dollar budget can hire a bunch of writers to get the content kickstarted. But ultimately, the problem of persuading thousands of people to contribute to a brand new service is not a problem that anyone knows how to solve -- it either takes off or it doesn't.
2) why write new source if your goal is just to launch another wiki?
The right direction: Wikipedia with a constitutional bias against deletionism. Only false, illegal, or privacy-violating information should be deleted. Everything true should be welcomed.
I look forward to creating the article "List of random numbers generated by hugh's random number generator on September 18, 2008".