After charting everything out to the best of my ability, I think it'll be 40 minutes from the seating of the relatives at the beginning until we walk out at the end. Here's what we've got going on:
Songs in the beginning when everybody sits down, bridal party enters, I enter, etc.
Introduction by Officiant
Reading #1
Reading #2 (both are short poems)
"Falling Slowly" (two minutes long)
Handfasting (will happen during part of song)
Officiant's Stuff and Bible reading
Vows
Reading #3 (another short poem)
"Seven-Fold Amen" sung by church choir
Recessional - All done.
WDYT? I'm not totally decided on it, so feel free to shoot stuff down if need be.