If cage-free, off-leash accommodations were the last big trend to sweep the boarding business, than sleepovers with regular folk are the new sweet spot between home and kennel. Today, several websites connect dog owners seeking a more hands-on, affordable boarding experience for their pups with dog-loving hosts eager to open their homes to canine visitors but with varying degrees of pet care experience.
Launched in Phoenix in 2004, the same year as Facebook, SleepoverRover.com  helped pioneer the current web-based wave of hosting dogs as guests in private homes. With experience in pet retail and grooming and a desire to find a low stress alternative to kennels, co-founder Maggie Brown set about recruiting retirees and stay-at-home parents to take care of dogs in their homes.
Unlike newer sites, Sleepover Rover representatives evaluate each host and inspect each home, in some cases, providing dog-proofing and behavior advice. Sleepover Rover actively facilitates each match, handles payment (splitting the fee with hosts), and follows up on each home stay. Sleepover hosts are located in Phoenix, Tucson, Las Vegas, Denver, and in Southern California from San Diego to Santa Barbara.
In 2011, two sites—DogVacay.com  and Rover.com —launched more open-market versions of the same concept. Like AirBnB, these sites allow dog owners and dog sitters to post profiles for free. Owners are responsible for selecting a sitter and making arrangements, although they pay through the site, as well as checking references, which include onsite and other social media reviews. The sites take a percentage, from 3 to 15 percent, of fees collected by the dog sitters.
Started by a husband-and-wife team, DogVacay was originally limited to Los Angeles and San Francisco, but now has more than 10,000 qualified hosts (DogVacay interviews hosts and checks references) around the country, concentrated in urban areas also including New York, Miami, Dallas, DC, Chicago and Atlanta. The hosts make an average of $1,000/month.
A well-funded, Seattle-based startup, Rover.com  started by putting down roots in the Pacific Northwest but is now actively expanding in 52 cities.
In a recent New York Times  blog specifically about DogVacacy the important issue of insurance was examined. While traditional homeowner's policies provide coverage that protects you in the event that your own dog bites someone, typically if a “guest” dog does likewise, this wouldn't be covered. You would need to acquire specialty insurance coverage for pet businesses, similar to groomers, boarding kennels, etc.
The Times  article, explains:
Some local jurisdictions might also have laws about the need to have a business license. In Houston, for example, you might need a kennel license and an inspection.
Even though a few of these services do initial “vetting” of the hosts for you, and urge you to meet the “host” before you finalize your arrangements, some comments on the Times piece express concerns about leaving a dog with someone you only met on the internet. Have you used any of these services? Would you be interested in using them, or even being a host?