I brewed a maple sap double IPA on April 2, using sap for the mash and sparge water. The OG was higher than expected at 1.083 but the volume was off and I left a lot of wort, trub and hops in the kettle. It finished at 1.016, which is on the sweet side, but it balances the bitterness (Beersmith says 118 IBU). It is dangerously drinkable for an 8.8% ABV beer. I plan on trying this again next year, but I need a session beer on tap at the same time! Actually, that would be a good way to grow up some healthy yeast.
Anywho, I put up a video of the brew day on MoreBeer's site:http://morebeer.ning.com/video/maple-iipa