I climbed this route Halloween of last year (10/31/2010) and have looked all over the place but can't seem to find any information if it had been done before.
I find it too obvious of a route to be missed, but that whole area seems rather neglected in favour of the much more prominent and aesthetic peaks nearby. Any information would be fantastic.
Herlihy Peak is the south summit of nearby Pyramid Peak, as described by RJ Secor in his guidebook. The summit identified here is listed as Peak 3592m in Secor's book, page 368 of the 3rd edition.
Note that the route information from RJ Secor is for the actual Herlihy Peak, not the one depicted here.