Why not use a Handspring for everything? Simple- the more complex it is, the harder it is to break. Trust me, I'm a computer engineer. Ruggedizing is, unfortunately, not a big deal, even with wearable makers. <br><br>The displays are the weakest thing after waterproofing, and I'll be honest- if you can open it, water can get in it. Period. Seals wear out, and have to be replaced exactly right, or they may as well not be there. Even if we can make an oops-proof waterbarrier for openings, there is still the matter of a 3x3 screen that can be taken out of commision with the kind of pressure you can apply by hand. <br><br>If you like it, get a waterproof case for it. But don't rely on it. The reason why we all carry more than one knife or method of firestarting is becuase things go wrong. Matches have one, maybe two, "Murphy factors" a piece. A mirror has one. A PDA has a few thousand. <br><br>So does a radio, but a ELB has a better range than a cellphone, and those are ruggedised already. <br><br>