[andrewcooke]

the disconnect extension http://disconnect.me/ includes an option to depersonalize searches (which seems to work by killing google's cookies).

there's also http://www.googlesharing.net/ which is an anonymizing proxy service, but i think it's firefox specific.

personally, i just stopped using their other services (i tried disconnect, but vaguely remember various issues when otherwise logged in) - as far as i know, they don't track you when you're not logged in (to be more sure i also use ghostery - that, together with disconnect, prevents a lot of tracking).

[greyman]

Killing Google's cookies will not make your search anonymous, since you can still be identified by your IP address.

[pconf]

Not just IP address but also browser signature, screen size and resolution, javascript settings and anything else in the HTTP header. See http://browserspy.dk/ for details.

[andrewcooke]

yes, i know (and also browser fingerprinting if they really wanted to), but do they do that? as far as i know, they do not (likely for various reasons - bad press, confusion of people behind NATs, etc).

[i mean, more exactly, that i have heard nothing about them updating personal information with data from searches when not logged in; i am not talking aggregate info like typical searches from geoip locations]