Gear bags? How portable are you?

How do you carry your PDA?

- Pocket?
- Bag?
- Backpack with loads of other stuff?
- Something else?

I've been using a rucksack / backpack for ages now, but I've had replace it due to wear and tear. I'm replacing it with another backpack type bag, but I'd like to hear from anyone who uses any other, less conventional methods for carrying your gear.