Get serious about stopping global warming by spending five days on your bike from May 15-19. The yet-to-be-determined route will likely include the California coast and wine country. The event supports four organizations that focus on climate, energy and bicycle advocacy. Start your fund-raising efforts ASAP — each rider must raise $2,400 by May 1 to participate. (Note: The site is currently focused on the 2009 ride but will be updated.)