As of very recently, I have had the pleasure of working on contract for Ping Identity – and I have been dying for today, because I can finally talk about what the combination of PingConnect and Google can accomplish.
Traditionally, the ability to integrate a disparate set of cloud applications for a userbase was predicated on the non-trivial task of first creating a Start of Authority. As a bare minimum, you had to (a) create an authoritative user repository and (b) enable some kind of service to perform an initial authentication and leverage the resulting session to facilitate federation to various parts of the cloud. After that, you still had to figure out who could consume what you had worked so hard to be able to establish.
Now, you can make Google your Start of Authority, and instantly get to a laundry list of 60 applications with PingConnect. All without a Windows domain, a WAM server, or a federation server, and best of all, by utilizing an existing repository that is likely to be maintained regularly. AND, there is actually useful stuff to get to. This may not sound like a big deal to the companies who all have Windows domains anyway, but I believe that this could push back the need for a growing small business to get a Windows domain quite significantly. To me, the start of authority problem was a massive barrier to adoption for federation, and that barrier has been obliterated, not just on the cost front but on the effort front too. They say it takes a village? Well now we actually have one worth hanging out in.