Trish Regan is the creator and host of one of CNBC’s most highly rated documentaries, Marijuana USA. We go inside the hazy world of marijuana on 4/20—there’s a pun there—to expose California’s #1 cash crop and discuss her latest book Joint Ventures.

David Ford, author of the book Marijuana: Not Guilty As Charged, discusses why he’s in favor of legalizing marijuana. Proposition 19 on California’s November 2010 ballot will ask voters to legalize the sale and distribution of marijuana.

Here is the lineup of guests on BRAINSTOMIN’ with Billy the Brain for Tuesday, August 17, 2010. Listen at or on AM 1400 in Ventura at 10 o’clock am Pacific time.