We absolutely need a viewing and mark up app for the iPad!
Punch lists, site visits, job meetings, goodness it would save my back from carrying a laptop everywhere! I hate creating PDF's of everything to take with me...
There are too many possibilities for this device to ignore it. I used it in two continuing eduction seminars to take notes, do research and hope to replace my laptop permanently for teaching. I have had one for a couple of weeks, and have used it all day and can't get the battery below 40%. Its insane. We just purchased 3 more yesterday... It will not replace any desktops, but it will improve our work flow with meetings and communication.