Remy: I live in a place which gets sandblasted almost all hours of the day this time of year, and I've noticed no problems with dust under the screen. All over it now... that's a different story
Robert: My office is at home and I don't travel much, so my Palm is in and out of the cradle all day. I haven't stress tested the battery that I'm aware of, but I can tell you I've read books for several hours straight before having to charge. If I had to guess I'd say 5-8 hours of straight use before charge is needed. And if I'm not mistaken, this is about the straight use I got out of my Vx and 505.
Hope that helps,