The reunited duo will be touring behind a new CD, "Promise of Summer," their first recorded work together in more than a decade. The 11-track album, which features 10 original compositions in addition to a remake of an earlier Jackopierce song, "March," will be available Sept. 9 as a digital release and through the act's website.

The duo released its previous studio effort, "Finest Hour," in 1996, followed a year later by a sold-out farewell tour and "Decade," a retrospective double-album.

"We both admit that we did not realize or appreciate what we had," O'Neill, in a press release, said of the pair's musical split. "There is a lot more gratitude--for each other and for the gifts we have to write and play music."

"We have been blessed with the ability to strap guitars on our backs, get on a plane, and go play a show anywhere in the country," added Pierce. "That is the career I always hoped we would have."