Thanks for the reply, Kemp! I ended up deciding I liked the look using 7's instead, so that helped some, and I bought one extra skein. Hopefully that'll be enough to get me to something close to a good size. The rows are much larger when I knit the lace than they are in stockinette... I wish I knew what the row gauge was that was used in the pattern.
Whatever, though, I'm enjoying knitting it, and that's what matters.