GOOGLE SUBDOMAINS
The following subdomains returned a valid IP address when
requested and thus have a machine at the other end.

My blog pos about the process and findings is here:
http://www.revolutiondove.com/archives/2005/10/google_subdomai.html

ads			- google adwords
america			- forwards to google
amp			- cant connect
answer			- forwards to google answers
answers			- google answers
asia			- forwards to google
base			- google base
calendar		- forwards to google
catalog			- forwards to google catalogs
catalogs		- google catalogs
catalogue		- forwards to google catalogs
catalogues		- forwards to google catalogs
code			- google code
compute			- time out
console			- google search administration console
d			- forwards to google
desktop			- google desktop
dexter			- time out
directory		- google directory
download		- forwards to google software downloads
downloads		- google software downloads
earth			- google earth
email			- forwards to gmail
europe			- forwards to google
federation		- time out
feeds			- time out
frugal			- forwards to google (though it seems 
			like it should forward to Froogle)
fusion			- forwards to google
gap			- time out
gnome			- cant connect
group			- forwards to google groups
groups			- google groups
ham			- cant connect
ignite			- time out
image			- forwards to google images
images			- google images
investor		- google investor relations
investors		- google investor relations
jam			- cant connect
jump			- forwards to google
labs			- google labs
lag			- cant connect
local			- google local
locale			- forwards to google local
mad			- cant connect
mail			- forwards to gmail
map			- forwards to google maps
maps			- google maps
mini			- google mini
mobile			- google mobile
moon			- google moon
nag			- cant connect
news			- google news
ns			- time out (probably the google name server)
opt			- forwards to google
paw			- cant connect
posting			- forwards to google groups
print			- google print
protocol		- forwards to google
proxy			- time out (probably the google proxy server)
publisher		- forwards to google
purchase		- forwards to google
purchases		- forwards to google accounts
ratings			- forwards to google with a broken google logo image
reader			- google reader
relay			- custom google 404 page
sandbox			- forwards to google, but passes get variables too
scholar			- google scholar
search			- forwards to google
services		- "This space intentionally left blank" page
shopping		- forwards to google
sprint			- cant connect
support			- google enterprise support
talk			- google talk
transfer		- connection reset
translate		- google translate service
unreachable		- connection reset
vat			- cant connect
video			- google video
virgin			- forwards to google
w			- forwards to google
web			- forwards to google
wire			- forwards to google