very interesting.
all (google online office services) in one google service?

More than likely, they're just registering a bunch of domain names now so they have them in the future if they ever decide to release a product... it also stops people from launching other products that sound like they could be google's.

while we're at it.. I can't figure out what google.com/pagead and google.com/mbd are ... but both display non normal "not found" behavior.

Or they're launching camouflage domains... you know, register 100 domains, 99 of which you never use, and 1 which turns out to be the real product :)

yes, Philipp that would be a strategy..

Stealth domain acquisitions and then launch only one domain for production purpose.. However, they are also protecting the brand from malicious squatters. If Google, can send out an memo to NYT which sez please dint mention the term "abc googled it" – rather use-- "abc used Google to search" , then in the same token it would be prudent for Google to protect themselves from domain squatter's /parked domains for such services same type verbiage domains...

I think they don't register these domains but get them back from other people for trademark infrigement or something especially that some of these names are so stupid.

Not that they actually need *any* domains beyond google.com... what's wrong with good ol' subdomains (groups.google.com, maps.google.com, etc.)?

I agree with Phillip here, GoogleRiya seems like the perfect such example while they were quietly buying Neven Vision