First of all, love your work. Very nice.
When you click your account name in the top right corner of the screen, and click the influence tab, it should display something like this:
This should include all referrals, except the all too common ones where people forget to use your referral code etc.
I'm aware there has been mention of other IP rewards pending that haven't been awarded but are being tracked, but I have no idea what those are.
EDIT: My referrals (or at least the few that used them) appear to be showing. If yours were showing before, it may be a bug? Not sure why it would clear though.