I use a Telelprompter app and a Slate application for video production...I am an audio engineer and end up working with DSLR camera's with no Time Code, so slating a take with Time of Day makes logging and editing footage a lot easier...
The prompter app is great for some of the news stand ups when the talent cant remember their line...The screen is big enough that they can read their piece without a hitch..
I also plan on using it for its USB host functionality once I take the plunge and root my Xoom...I will use that so I can do file transfers from SD card camera's to portable hard drives to hand to the client...Hopefully its something I can actually make work...I'll report back once I get to that point.
Because of the field I work in, my X and my Xoom save me a lot of time in front of the computer at night...I can invoice my clients before I leave a shoot...check call sheets, schedule jobs with the calandar and sync to google etc...I've manage to integrate this in to all facets of my job...
I was gonna write it off anyway, I figured I might as well REALLY use it for work