The University of Pennsylvania runs the N3KZ UHF linked repeater system (Internet-linked, AFAIK). It covers SE PA, some of NJ, and NE MD. I was scanning through the memories on my FT-7800R and caught a call on the one in Eagles Peak, Lebanon County, PA. I wound up having a nice chat with a new ham who was using the N3KZ repeater in Havre de Grace, MD. I'm about 50 miles from the Eagles Peak repeater. My rig was set to 10W connected to a Comet GP-3 on my roof, while he was on a Yaesu FT-60R HT with a roll-up J-pole.
Internet-linked repeaters are a nifty blend of old and new tech. Obviously, such a system is more vulnerable to going down in a major SHTF scenario but it's a nice option when it is up, especially for those hams who can only operate on VHF or UHF.
Here’s detailed info about the N3KZ system from Repeaterbook.com: http://www.repeaterbook.com/repeaters/details.php?state_id=42&ID=168#sthash.FbOLU8Gt.dpbs