Just because no one else will. I've created a database of businesses and organizations rolling out the iPad on a large or trial basis.
This will help temper my otherwise wild speculations, such as the one I made last week that SAP's rollout of 1,000 - now 1,500 - iPads had to be the "single largest in the world," even larger than Apple's internal usage.
You can view and download the list, maintained via Google Docs, here: https://spreadsheets.google.com/ccc?key=0AtHwCbyxBngPdFphclJyUXJIZkNObUVGeDNfYnpOY0E&hl=en
I'll try my best to keep this list up-to-date for as long as it seems useful. But I'll need your help. So if you know about or read about a large deployment of iPads, please e-mail me at email@example.com or send me a msg via Twitter @ ericylai along with the relevant web link. I'll start a list of Android deployments as soon as those hit the market in earnest. Thanks!