West Chester's Walnut St. Labs has added Jeff White and Mark Thompson to its management team. The duo will work in the co-working space's incubator arm, particularly helping companies commercialize a series of new cloud computing technologies. White is the former chief executive officer of FingerWorks, which was acquired by Apple for its touchscreen technology in 2005, while Thompson is former chief technology officer of ING Direct, which is now part of Capital One. Together, the duo founded…