The Hangout has had two additional lineup rounds since its auspicious kickoff last month, and it just keeps getting better. A number of the adds are top-of-the-bill acts at other festivals. Here, only Phish frontman Trey Anastasio playing with his side project TAB cracks the top three.

Other big names that have been recently named include Ben Harper and Relentless7, The Flaming Lips and former Wallflower Jakob Dylan with his new configuration Three Legs featuring stars in their own right Neko Case and Kelly Hogan.

Add to that Yonder Mountain leader Jeff Austin & Friends, blues rocker Grace Potter and the Nocturnals, southern rock brother act North Mississippi All-Stars, New Orleans soul standbys The Funky Meters, and indie singer-songwriter Ray LaMontagne, and you have a pretty impressive second-day story.

Remember, the first round included names like Alison Krauss, Zac Brown, John Legend, Michael Franti, Keller Williams, Govt Mule, The Black Crowes and a lot more.

Dierks Bentley at Delfest with members of The Travelin' McCourys (Photo by countrygal24)

MerleFest filled in its conspicuous Friday night TBA, announcing that country star Dierks Bentley will bring his just-announced Up On the Ridge bluegrass-oriented show to the festival on May 30, with backing from The Travelin' McCourys.

The performance is the only announced festival stop on the 24-date tour, which will introduce Bentley's new bluegrass concept album Up On the Ridge, due to be released this summer. Appearing on the album with Bentley are The Del McCoury Band and the Punch Brothers with Chris Thile, along with guest appearances by Alison Krauss, Miranda Lambert, Tim O'Brien and Sam Bush.

You never know what configuration Keller Williams will show up in but you can be pretty sure he'll be on the bill at All Good Music Festival & Campout. He heads the list of second-round additions as Keller Williams and the Added Bonus.

And what is the Bonus? It is described on Keller's Facebook page as "an even blend of Keller's solo looping show and new flavors of grassy disco jazz funk featuring Claude Arthur, Jay Starling, Toby Fairchild as well as digital visuals by Scott Sunn." Sounds good.

Also new for the 2010 fest running July 8-11 at Marvin's Mountaintop in Masontown WV are Bassnectar, Garage a Trois, The Travelin' McCourys, Dr. Didg, and The Lee Boys. Also sounds good. 

They join a great jamfest lineup led by Further (the latest Bob Weir-Phil Lesh incarnation), Umphrey's McGee and Widespread Panic.

Canada's oldest folk festival remains one of North America's best all-around roots music festivals, judging by the just released 2010 lineup.

Some of the notable international stars on the bill include John Hiatt & The Combo, The Levon Helm Band, The Avett Brothers, Emmylou Harris and Hot Tuna. But the festival is known for its eclectic mix of singer-songwriter, world, blues, indie, string-band, Celtic, and other styles.

Other acts to look forward to include Andrew Bird, The Cat Empire, The Swell Season, Sarah Harmer, Greg Brown, Sonny Landreth, Geoff Muldaur, Alvin Youngblood Hart, The Wilders and Works Progress Administration. Hip-hop stars Arrested Development will make a much anticipated debut.

Winnipeg maintains its connection with the early days of the folk genre by presenting third-generation representatives of folk legends Woody Guthrie and Pete Seeger with Sarah Lee Guthrie and Johnny Irion and Tao Rodriguez Seeger. Also, nonagenarian Oscar Brand, a native of Winnipeg who played the very first festival in 1974 will get a honored appearance.

Earthdance Northern California announced its 2010 festival running Sept. 17-19 will be its last year at Black Oak Ranch in Laytonville CA, after which it will move to a larger venue. Early bird ticketing opened for an allocation of 500 tickets at the discount price of $140. The festival plans a "grand farewell" to the grounds that have hosted the event for eight seasons.

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Ravinia Festival, the Chicago area concert series that claims to be America's longest running music festival, announced its popular music schedule, supplementing the previously released Chicago Symphony Orchestra repertory season schedule.

The most in-demand tickets could be for two performances by Sting backed by the Royal Philharmonic Concert Orchestra as well as shows by Crosby, Stills & Nash, Sheryl Crow, and Carrie Underwood.

But there are a huge number of major stars in every popular music genre, including Backstreet Boys, Big Head Todd And The Monsters, Bobby McFerrin, Buddy Guy, Cheap Trick, Colbie Caillat, Dave Brubeck Quartet, Earth, Wind & Fire, Garrison Keillor, George Benson, Jethro Tull, John Hiatt & The Combo, Nancy Wilson, Nelly Furtado, Peter and Paul, Poi Dog Pondering, Procol Harum, Sheryl Crow, Soulive, Squeeze, Steve Martin and The Steep Canyon Rangers, The B-52s, The Beach Boys, The Bodeans, The Cat Empire, The Four Tops, The Levon Helm Band, The Moody Blues, The Ramsey Lewis Trio, The Swell Season, The Temptations, Train, and Vince Gill.