Flickr: Creative Commons by *christopher*

As Rachel sails the high seas on the Air America Cruise, "7 Days in America" co-host Arianna Huffington steps in to guest host The Rachel Maddow Show on MSNBC tonight at 9pm.

It looks like Arianna is putting together quite the line-up of guests for her temporary gig. They include Google CEO Eric Schmidt, comedian Bill Maher, Newark mayor Cory Booker and statistics rock star Nate Silver of FiveThirtyEight.com.

Rachel will return to Air America and MSNBC this Thursday.