I found some bugs in simple google connect.
Hope you will fix it in your next version.
1) I connected my google account from my profile yesterday. I tried to login using "signin with google" button.
But it pops up a windows loads 5 seconds and then displays "Error 404 - Not Found".
But when i refresh my main site, its logged in.
2) I clicked logout button. But its shows blank page instead of redirecting me to the login page.
Ps: I tried many plugins for google,yahoo,twitter and facebook connect. I tried around 7 plugins. But most of them has bugs. They doesn't have security as much as your plugins does. And the best thing is your plugins often updated. So your plugins are my best choices.
I installed sfc,stc and sgc.
I'm fully satisfied with SFC.
STC and SGC doesn't offer, registration directly.
It would be awesome if they have registration module.