Tim Crawford analyzes variable stars from his Arch Cape Observatory in Oregon. He is very open, responsive, and enjoys sharing information and helping new observers get started.
Kevin McLin, director of the Global Telescope Network is very responsive and helpful in providing information about how to participate in astronomical research.
Mike Weasner, Cassiopeia Observatory, Oracle, Arizona. Mike is an exerienced amateur astronomer and author. His website provides a lot of useful information, and he has been very responsive to questions I have emailed him.
Attilla Danko, Clear Sky Chart. Attilla creates astronomers forecast charts. Each chart shows at a glance when, in the next 48 hours, we might expect clear and dark skies for one specific observing site. His website has charts for almost 4,000 locations across The United States and Canada.