TechTown, Detroit \'s emerging high-tech hub near Wayne State University , plans to transform itself into an urban village filled with retailers, residences and pedestrians by 2020. In its second year, the 12-block area formerly known as New Amsterdam has attracted 21 businesses, including Asterand, a human tissue bank, and Academic Computing Environments, which rebuilds obsolete computers for schools. Most are housed in a six-story building called TechOne, a rehabbed 1927 warehouse designed by Albert Kahn. As more startups need lab and office space, TechTown intends to convert nearby vacant buildings into TechTwo and TechThree within the next few years. But they\'re only pieces of the overall vision for TechTown. \"Ultimately we want to build a community where people live, they work and they play,\" said Howard Bell, TechTown\'s executive director. \"There are only a few major metropolitan areas that have even attempted to do what we\'re doing today.\"