I just returned from a fantastic ultralight fully loaded tour from my doorstep in Eugene, OR down the coast to SFO. I got my dry weight down to 15 lbs (or 34 including the bike). No panniers.
I've been honing my kit list over the past year using the expertise of you lovely BPL folks, and it paid off. I was the fastest, lightest one on the route!
Here's a little sample of my kit list:
Hexamid solo+ with tyvek groundsheet and dac pole stolen from my copper spur
Homemade penny stove and small Ti cookset (snowpeak)
Minimal, multiuse layers of clothing
Minimal tools + first aid
Minimal rear rack
Granite gear stuff sacks