OK, I've breadboarded the 18F2550, with 8 LEDs running off port B, 4Mhz xtal across pins 9 & 10 with 22pf caps to gnd. 10K pull up on pin1 (MCLR) and power to the vdd and vss pins - but the LEDS don't run.

My logic tells me that I need to set port be to digital, but can't for the life of me work out how to.