Oh yes, I have every show now in digital form: all paperwork, forms, designer drawings, etc.
I like to scan then edit my scripts via Adobe Acrobat (it lets you cut an paste-also save as a word document) and then digitally put in cues. Lord knows how many time pages have been ripped out.
Usually, once a show is in production, I keep all my un-necessary paperwork on a USB drive in my book-this includes, rehearsal reports, dailies, weeklies, fitting schedules, breakdowns for rehearsal, designer finals, etc. I don't like bulky books when I call, so I try to keep all of these items in one place, yet on-hand if anyone needed to access them. I also keep all my files on dropbox, and have shared this with the other SM's working at my theatre (we all use it) so that we all have access to any needed paperwork at any given time, anywhere.
However, I would never call off of my computer if I absolutely had to. I like having the hard copy, emergency and medical procedures, and actor information right in front of me for a show, so that, god forbid, I have to pull that up quickly, I can flip through a book instead of clicking a bunch of files. I'm weird about it, I know.