I see my PC has TCP connections open to 1e100.net. Looking at the content this seems to be a Chinese site and I immediately feared the worst re viruses/malware. Then I checked the whois record and find it is registered to...Google. Weird.
A quick search seems to indicate that 1e100.net is pretty popular - about the same reach as adobe.com or bbc.co.uk according to Alexa - but what the hell is it? I run Chrome so assume it might have something to do with that, but why all the Chinese and why does so little information appear on the web about it?
Edit: Ie100.net != 1e100.net - explains the Chinese!