It's been quite a week for Kevin, Joe, and Nick.

Don't know who they are? You're obviously not a woman between the ages of three and 30, the parent of a teenage girl, or someone with regular access to any form of mainstream media.

The Jonas Brothers are a budding tween franchise with dark locks, bright hooks, and the ability to actually play their instruments. They're currently busy invading Manhattan.  Click here for the numbers behind the Jonas Brothers.

The trio appeared at the Virgin Megastore in Times Square at midnight Monday to celebrate the release of their new album with several thousand frenzied fans. The album, A Little Bit Longer, is their second for Walt Disney Co.'s Hollywood Records label, and it immediately went platinum. The next day it was iTunes's most-downloaded album.

The band hosted MTV's Total Request Live this week, and is making the rounds of other programs: 20/20, The Tonight Show with Jay Leno, Live With Regis and Kelly, and the Teen Choice Awards, where the brothers won six awards.

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The invasion began with a concert last Friday in Bryant Park, part of a series on Good Morning America; 15,000 screaming fans packed the park.

The brothers are playing a sold-out tour, and just finished three capacity shows at Madison Square Garden. The tour is being filmed for a 3-D movie, in theatres this winter; Camp Rock, their Disney Channel movie, premiered in June to 8.9 million viewers.

On September 7, the band plays the MTV Video Music Awards, for which they have already garnered a nomination. They are about to start filming a show, J.O.N.A.S. , for the Disney Channel, which will air next spring.

And there's a book, commemorating the tour, coming out around Thanksgiving.

For all of that hoopla, however, the band's reported earnings for the past year—about $12 million, comprised of touring and CD and merchandise sales—are as modest as their values (the boys, ages 15-20, wear "purity rings" to signify their commitment to sexual abstinence).

The $12 million figure landed them on Forbes magazine's list of top-earning celebrities. But it's not nearly enough for the Jonases to challenge, much less dethrone, billion-dollar pop star Miley Cyrus as the Queen of Tween.

Her reign may be waning, though, as gossip in Seventeen magazine (ironically, about her relationship with 15-year-old Nick Jonas) and racy photos in Vanity Fair have soured her image with some young fans.

The Jonas Brothers are a different matter. The group signed with Hollywood Records in December 2006 after a stint at another label as a Christian rock group. Their first album with Hollywood went platinum, but only lately have the boys begun to exploit other avenues to media dominance.