Hi Mike
I have added a few sites as well but, like you said, you only see the ones that you added personally so hopefully we are not all doubling or tripling up. I might have to try adding the same site a couple of times and see if it flags it as already existing.
For an organisation like Google, it really seems like a half baked attempt at it, with the page widths and other issues that we have found so far. Good idea, execution needs work
Cheers
Gavin