I haven't heard the new single yet, but "Heartstrings' is a song they've recorded and released before, at least 3-4 years ago, so it's a pretty old song by this point. I'm surprised more fans of Frost* don't already know about it. Since EIMA, Frost* (or perhaps just Jem) wrote and even released some single songs over the years, though they were on some fairly rare or hard-to-find releases, not EPs or LPs that major record labels would release.
Less than a month now for this (and the new BBT), and I'm glad I already have my pre-order made from BurningShed, though I missed out on the signed postcard from the band. Oh well...
-Marc.