iPad at Work
Here's some uses both my me, coworkers and dept:
ME: I use the iPad now in meetings to take notes (project coordinator). I've been learning the Omni programs (OmniFocus, OmniOutliner, etc) and I use those two both desktop and iPad versions. OmniOutliner is a great note taking program primarily because of the facile way you can quickly just add line items and indent them to show relationships then, if you're going to have "to do" items, just quickly create another column and make it a "Pop up" list style. Change the text items to "To Do", "Send email", "follow up", etc. There is a scanner program that works nicely with the camera and converts to PDFs. I've used Measures quite a bit around the office for jobs that I manage that require knowing measurements (take a photo then draw arrows and fill in measurement info, save to camera roll or email to someone who needs it - designer, etc). Back to OmniFocus. This is great because it's a great "To Do" list with the ability to sort by project, sync to the omni focus server, sync with iPhone version, add deadline dates, view things "at a glance" (to dos, deadlines, etc). Of course safari and email as well. VGA adapter is nice for show and tell in meetings. We use google earth a bit lately. Also, Photosynth is a great location manager, allowing you to access panoramas you've shot of locations and access them on the device whether you shot them on it or not (via the website). Just can't use it for sensitive data as it's not a private server per se (but you can opt not to publish and keep the panoramas private)
FILMMAKING/ACTOR (ME): In my other life as a filmmaker I use it as an e-reader (scripts), Orator for practicing lines, Movie Slate for DSLR sync sound, Pro Recorder for portable digital audio (that's more for the iPhone though), and I save equipment manuals for anything I think the crew might need to access on location for those pesky situations where someone isn't as familiar with a piece of equipment and needs help changing a setting (very indie stuff here if you can't tell).
OTHERS: I've seen them used outside conf rooms, synced with exchange and displaying schedules for the room. Also seen them as a portable "check in" device for events and a virtual "tour progress manager" via a website that pushes out updated from the "tour host" for others to track the progress of the tour via any web browser on company network wireless with a wireless certificate from company to authenticate the mobile device.
I'm sure there's more.