On another test Bb server (still at 9.1SP3), I put the google tracking code on our custom login page.
With that I could get the same level of visitor information as before: visitors, their browser information, their geolocation, etc.
And until the content tracking is more meaningful, maybe that's all you really want.
Update: April 25th
A funny thing happened when I started looking at the visitor analytics of our Bb 9.1SP3 test server's login page. I was seeing odd referring sites. On investigation, it turns out the external DNS assigned to our test server was also, at one point, used by another site. So we were picking up those hits!