Better user sign in/sign up process (updated)
[question updated based from comments below]
i wish the whole flow of a new user asking a question was more elegant.
1) i think the button "Login/sign up to post" is rather confusing to users
2) Even users who want to login to post (with their existing Google/Yahoo/ etc account) are presented with yet ANOTHER page to fill out their screen name and email. I think this page is unnecessary and presents a barrier for many regular one-time users.