After using the 16F series and some of the simpler 18F devices, I picked up some of the PIC18F25K50 microcontrollers. 

I found that the HiTech-C compiler doesn’t support the K50 series at all, so I switched over to the C18 compiler.  I can get the code to compile in C18, but it won’t link.  It turns out that Microchip messedup the toolchain and didn’t include the necessary libs in version 3.45.

The only thing to do is pack up those chips and wait another 6–18 months for Microchip to pull their thumb out.