Google and Hybrid Onboarding i.e. hybrid single sign on for registration

Did anyone catch this blog article on Google recently?
http://googleblog.blogspot.com/2009/11/cutting-back-on-your-long-list-of.html

I think we need to have this Hybrid Onboarding capability built into the MODx user registration and management system.

Did you see http://modxcms.com/forums/index.php/topic,32390.msg201620.html#msg201620

I am sceptical of trusting to much on this other than for waves and certain
pages. What if the day comes when Google start charging fees. Ok If it’s open source...

I’m more concerned about people who don’t realize that they’re authorizing Plaxo (Comcast) to plunder their entire email address book at Google. There appears to be no way to opt out of that and still have the system work.

OpenID has a lot of traction out there on the interwebs, and is worthy of support IMHO:
http://modxcms.com/forums/index.php/topic,7501.0.html