geilt - 5:25 pm on Jun 20, 2011 (gmt 0)
"It still remains to be seen whether Google restricts this kind of alt-domain in the SERPs only to domains that satisfy other criteria, e.g., their DNS has the same IP address."
This would make a lot of sense, or they could also check the Registration information for the domain, nameservers, or some other "Branding" algorithm.
It also may be possible they are doing this in order to maintain brand integrity from bought out brands or websites. If they are listing these 301'd domains individually, do you think this would effect the link juice value of 301 domains too? To me it would seem the Link Juice would continue to go on ranking the original domain and not so much of it being passed to the new one.
Even though it will still 301 on click, it still creates sort of confusion but also makes sure that WYSIWYG (What you search is what you get) so all the sudden a weird domain name doesn't show up in the SERPS were it wasn't supposed to originally, perhaps if what ranked before made more sense than what does now?