The two unaccounted for hybrids have been identified as 5603H and 5608H. All of the reported buses, save for 5606H are now at Southern (at last report, 5606H is still at Germantown). 5612H was reportedly on the 476/Turnpike Extension en route to Philadelphia on Tuesday (this may have been a delivery; it appears they're taking I-80 from the Midwest and picking up 476 to get into Philadelphia, presumably to avoid the Mainline PA Turnpike tolls). The above listed buses join 5605H and 5611H as confirmed hybrid vehicles on SEPTA property.
I'VE HAD IT WITH THE 104
Rather than waste blog space bitching about the 104, I've decided to start posting problems that I encounter on that line in the guestbook. Today's posting involved a delayed bus right before the start of the PM peak. Let's just say it's starting to become a broken record.