They could at least tell you which account has been signed up. Everything's so easy with 1-click, but now that I have multiple accounts signed in at the same time, I have no idea which one requested the invite and I'm going to have to continue to watch _all_ my inboxes... if it has an Android part, which it better, I sure hope I've linked the right account to the invite so that the device can download the app.
This and all those other places offering a Google Oauth option prevents me from logging in to multiple accounts on my main browser (Chrome). Although if you do a Google Oauth, it will let you select which email you want to use. I hardly use anything else apart from my personal Apps account, and hence it makes sense to have only a single login on your main browser.
You would hope -- I noticed the same issue. I ended up just opening an incognito window and logging into my main account that I use for e-mail and requested an invite there. Hopefully that'll make sure at least something lands into an inbox I check.
I'm not going to complain though, I just want to try it out!
grumble grumble
It actually looks cool though.