If you host it yourself the following questions come to my mind:
Thanks for the response, Klaus. The reason I'm looking for folks with some first-hand experiences to share is because I don't have anything in the way of firsthand experience with SalesForce, which is running as a hosted application. Some of the pages are "custom" and we definitely have control over making sure that the JS ADK is referenced from the document head, and I think I am seeing in the SalesForce CRM documentation that it is possible for the "out of the box" pages to have script references injected in the head. but am not 100% sure. In addition to the mechanics of injecting the script, was hoping folks might also comment on whether a successful implementation brought them value.