OS X 10.9 Redistributable? I work in an Apple-only office environment with ~40 Macs. Is it possible for me to download an OS X 10.9 redistributable so that we're not downloading 5+ GB continually over our ADSL link ?

Thanks!
Yes it is. 

You can download it once and then distribute it over an external Harddrive, an USB Flash Drive or your network. The package is called Install OS X Mavericks.app and you will find it in the directory /Applications.