I've found a bunch of awesome tiny GPS gadgets like that, fairly cheap. I was about to buy one till I learned I could just get a PDA with built-in GPS. Since I'd use it for travel, I'm not very likely to bring my laptop to a place where I'd want a GPS.
No. So far I've talked myself out of one more box to pack. I have a Garmin Nuvi for land use. I'd only get the Pharos for use with my Windows Mobile phone.