Thank you!! I thought it might be a long shot... But thank you so much for the info.

Another thought:
The Firefly theme song is really good on guitar -- have you thought about having someone play it on an acoustic guitar? Still gives you the string sound you're looking for, but without the difficulties of translating a non-harp piece to the harp.

Well...the theme probably COULD be played on harp, but it's not naturally a harp tune. The chord changes would be a real challenge (perhaps not possible) on a lever harp (folk harp or small harp), but would probably be do-able on a pedal harp (classical harp or concert harp). The piano sheet music is a good start; most harpists are able to interpret this kind of music and create a harp arrangement from it, but not every player has that skill, and some require a harp arrangement. My suggestion is that you show your harpist the piano sheet music you have, and ask her/him if she/he thinks that she/he can play the tune, knowing that it's quite possible the answer might be "no." Another option is to get a Firefly soundtrack CD and arrange to play just this one tune off the CD through your sound system for your first dance, and then let the harpist handle the other music. Best of luck!