The first song from 'Southbound,' the Doobie Brothers' all-star album of their own classic cuts re-recorded with country artists, is now available. As previously reported, the Zac Brown Band put in appearance on 'Southbound,' and their Doobies-assisted cover of 'Black Water' is being offered as an instant download to fans who pre-order the album via iTunes.

"I have seen a lot of people, including myself, make a lot of tip money because of ‘Black Water,’ so this is a full circle moment," Brown told ABC News Radio. "To collaborate and recreate this iconic song is just an amazing moment as an artist. As a new-generation vocal band, it is an absolute honor to get to play with them."

If you're looking for an extra sneak peek of what might be on offer in 'Southbound' before ponying up for the pre-order, you can watch Brown and the Doobies hook up for a live version of 'Black Water' at Fenway Park earlier this year -- and with the album scheduled to arrive in stores Nov. 4, there's still plenty of time for more songs to make their way out into the wild.

Speaking of out in the wild, Doobies co-founder Patrick Simmons recently posted an update on the cross-country motorcycle ride he and his wife Cris previously announced as a fundraising effort for Stand Up to Cancer in honor of their son, Pat Jr., who successfully battled testicular cancer last year.

Mechanical issues dogged the Simmons' run, preventing them from making the full 4,100-mile distance, but as he wrote, they were "able to roll almost 3,000 miles" thanks to some valiant repair efforts and their oft-repeated mantra "Wrench, Ride, Repeat!" Safely back home and gearing up for the 'Southbound' promotional cycle, Simmons wrote, "Back to the music for me. At last! Whew ... Just in time."