re: the single most stupid thing I've heard in a while - wow, I say stuff way more stupid than that all the time. Really, though - most users don't look at a site and think 'gee, I wish the designer had dome something more original with the login UI'. They want to look at stuff and immediately know how it works. The UI needs to be almost mechanical. If they notice it, it is usually a bad thing, and if using familiar idioms helps achieve familiarity, then good.