Did a bit of work again. Now the UserValues are working properly, albeit still very basic. I solved one or two issues with them (among others an issue with versions tab not loading when a user view was added), and now all the features that accept user values will now show on their details page all the games that you've entered values for this. So using this, you can list what games you own, what you are playing, which you've completed, etc., all by going to the details page for that feature. I think the most sense to do next is make report groups, and how your values stack up against the average, etc.
I've also added Google Account integration, so you can logon using a Google account, while still choosing a user id. And I've solved an issue where in some cases a user did not get 1 reputation assigned at login, preventing them from being able to enter anything.