The tour has proven to be a hot ticket, with sellouts posted in most of the markets where tickets have already gone on sale, according to the band's website.

Since launching the run in Charlotte, NC, the group has touched down for a single night in Greensboro, NC, and played a pair of shows in Philadelphia Monday (10/1) and Wednesday (10/3). Reviewers across the board from publications ranging from the local newspapers to Rolling Stone have given the band high marks for those first four shows.

Van Halen's original, Roth-fronted lineup rose to fame in the late '70s and early '80s, but Roth split from the group in 1985 and embarked on a solo career. Sammy Hagar [ tickets ] took over in 1986 for a decade-long run with the band, but split on bad terms in 1996. Former Extreme frontman Gary Cherone briefly fronted the band for a poorly received 1998 album and tour.

Earlier this year, the group announced a summer tour with Roth, but had to scrap those plans when guitarist Eddie Van Halen entered a rehab facility.

In a clear reminder of the technological advances that have been made since Roth and the group last toured together, a flurry of video footage concertgoers at the first four shows on the current tour have shot on cell phones and other digital devices has been turning up online on YouTube and similar sites.

Ironically, the band's in-progress tour with Roth doesn't qualify as a full-fledged reunion of the band's original lineup, as founding brothers Alex and Eddie Van Halen have replaced original bassist Michael Anthony with Eddie's 16-year-old son, Wolfgang Van Halen.

Anthony, meanwhile, heads out this month on a 60-date tour with Hagar and Hagar's solo band, The Wabos, who launch the run with a series of performances at Hagar's Baja, Mexico nightclub, the Cabo Wabo Cantina, starting tonight. The outing is expected to stretch into next July.

Van Halen was inducted into the Rock and Roll Hall of Fame earlier this year. Hagar and Anthony were the only band members to attend the ceremony.