looking for latest info on cc amp's

They are still available, they just fly under the radar screen. I was walking downtown a few weeks ago and noticed a door that looked like an amp and I rang the bell. Sure enough, it was an amp.

Do any of them offer service on the level of the old callowhill?

They are not under the radar.  The other day I picked up a city paper and found the erotic page filled with AMP ads.  City paper was the source of info when I first got into the hobby. Now most ads, accept for AMPs, have migrated to CL.  

A sure way to spot an AMP is that the door has an over sized address number, and a camera is installed above it.