OpenID Popup Extension - Draft 0

[Allen Tom]

I uploaded draft #0. Comments welcome:

http://wiki.openid.net/f/openid_popup_extension_draft0.html

I was really hoping to make the OP's default popup size discoverable, 
but I couldn't figure out how to cleanly embed the dimensions into the 
XRDS. Based on discussions at the Facebook meetup this week, it sounds 
like 450px width is the magic size, as both Google and Facebook 
independently chose 450px for their popups. My designers have indicated 
that 450x500 should be doable, so I've set that as the recommended size.

 From a implementation standpoint, having the default popup size be 
discoverable might not be worth the added complexity.

Based on the PuffyPoodles and MadStreams demos, it looks like the popup 
is already working well with iPhones, so perhaps we can just recommend 
that RPs just use the Popup UX for mobile devices as well as for desktops.

Allen