Over the next decade, searches for extrasolar planets using the transit method will likely prove invaluable in testing theories of the formation and evolution of planetary systems. I review the landscape of transit searches for extrasolar planets, highlighting some of their basic properties, primary obstacles, important results, and future prospects. I discuss results from deep surveys targeting Galactic disk stars and stars in rich open clusters. I then speculate on the future prospects for transit searches, in particular the search for "Hot Neptunes" and "Hot Earths" from the ground, and habitable terrestrial planets from space.