Still annoying I have to type in my email address even though I'm already logged in to Gmail. With OpenID I just click a Google icon, some auth clicks, and I'm done. With this I have to type in my email and do some auth clicks.
Isn't this more of an issue with the current browser you're using? As in, once fully implemented in the browser you won't be prompted to enter it at all. Also, my understanding was that your session information isn't passed along (privacy feature), so it would have no clue you're logged in elsewhere.
You can choose different identifies to log in with. It doesn't know that you want to use Google to authenticate until you choose an identity. You could have used, say, a Yahoo identity, in which case asking Google to vouch for you wouldn't make any sense.
