From the official site:
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On June 28th, Virgin Records will release Out-Of-State Plates, a
specially priced 2-CD collection of FOUNTAINS OF WAYNE non-album
tracks and previously unreleased recordings spanning the group's
entire career.

Included are two brand new songs, "Maureen" and "The Girl I Can't
Forget", as well as the first official release of the group's 1999
version of "..Baby One More Time". The package will also include liner
notes written by Chris and Adam.

The band will be playing select dates in support of Out-Of-State
Plates, beginning with the May 22 benefit show in Central Park.

More details and complete tracklisting will be posted soon
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Am I being entirely too hopefull by assuming that if the band will be
playing shows in support of the b-sides collection... they might
actually play more than a couple songs from it at these shows?

Pete