I reached the halfway point of the wool, by weight, the other day. I had already decided, because, really, there is a little too much for me to do this week to devote enough time to knitting to finish the blanket by Christmas -- but this was really only a sort of over-achiever's goal, so I'm not particularly disappointed. The house will be clean and ready for the next round of parties over New Year's -- which are potluck! -- and I will therefore have lots of time to just sit and enjoy the knitting!
(I know, I know, "bisect" implies cutting or dividing, neither of which I'm literally doing here, of course, but there aren't many synonyms for "halfway" that begin with "b"! "Bifurcate"? "Betwixt"?)