Betamore leaders envision the nonprofit as the central node of an entrepreneurship network that spans the greater Baltimore area. The nonprofit’s Federal Hill offices can be a place for startups to set up a small office, or gather for educational training. Meanwhile a new 44-member advisory board will connect all the key players — investors, business advisors, successful business leaders — across the region. A new website, Baltimoretech.org, is designed to be the virtual welcome mat. Through…