Robert_Charlton - 9:54 pm on Apr 25, 2013 (gmt 0)
For a proxy to outrank you requires some coordinated effort. Your page needs to be requested through the proxy (as, unless it's requested, it's not normally just sitting there), and then the resulting url needs to be linked to.
Probably the reason that Google products are being used in this case isn't that they are favored by Google... it's that they are free. I've got to confess, though, that I haven't checked out the idiosyncrasies of Appspot.
With regard to Blogspot... quite a few years back, as I remember when Microsoft launched MSN, a common technique that spammers used to achieve rankings was to put scraped content on Blogspot and then to point a bunch of Blogspot links at the page. At the time, MSN was much more vulnerable to this kind of spam than Google was... so if Google is favoring Blogspot sites, it's changed policy. Since then, MSN has also morphed into a Bing, much more sophisticated than MSN ever was... and the current Google, while also much more sophisticated than old Google, is liking to index fresh content, which may or may not be providing spammers with a window of opportunity.
Additionally, spammers and hijackers tend to target Google (and to exploit weaknesses in the Google algo) because it's got much more traffic than any of the other engines. This is not the equivalent, though, of Google favoring its own properties.
That so many pages are able to outrank you, though, does suggest other weaknesses in the site.