Charlie Barrett has added a sit start to the classic Rock Creek arete, Dude (v9). The first move with a very bad foot, a nubbin for the right hand, and the left hand on the slopey arete is the hardest--a quick move up to gain a flat crimp for the right. It makes the climb a lot longer and less of a trick. How hard is it? Well, who knows ... "It's something to play around on," says Charlie.
A couple other things of note are two lines I did on the back of the Batter Boulder about a week ago: This is the boulder that is just up and left from the boulder with Clearcut and Overzealous (the Talus Boulder, in the guide). First, I repeated The Batter Effect (v5/6), though I started from an obvious left hand horn/sidepull and right hand on a good sidepull around the same height. There really didn't seem space to start lower if you want a pad under you, though apparently it was done from a lower start originally by Jeff Sillcox and a grade or so harder.
Then on the back of the boulder I did the jump-start arete at left (not too hard, but committing) and also a sweet little sit-start beginning at right (also committing, but harder--v6?? Really don't know). The latter crosses the slopers until you can swing out left, grab a sidepull and then roll into the good hold and then top out as for the jump-start--well worth doing, though some serious pad skills may be needed to avoid breaking your neck if you fall.