Did you know google stores their product icons all in the same directory?
That directory is: http://www.google.com/images/icons/product/
if the product is, for example blogger:
http://www.google.com/images/icons/product/blogger-128.png
This is the list of icons i've found, can you find more?


adsense
adwords
adwords_editor
adwords_express
affiliatenetwork
alerts
analytics
android
android_market
app_engine
apps
apps_marketplace
authenticator
blogger
blogs
bookmarks
books
boost
buzz
calendar
checkout
chinese_ime
chrome
chrome_web_store
chromium
chromium_web_store
classifieds
cloud_connect
cloud_storage
cloudprint
code
consumer_surveys
contacts
collaboration_engine
customsearch
desktop
dictionary
directionsearch
directory
docs
docs_cloud_connect
drawings
earth
earth_client
earth_enterprise
earth_pro
earthbuilder
ebooks
emaily
engage
english_ime
enterprise_earth_maps
fastflip
feedback
finance
forms
freebase
fusion_tables
gdn
goo_gl
goog411
google_favicon
google_generic
google_music
googlemail
googlemail_offline
gplus
groups
guru
gwt
gwt_designer
health
help
ideas
igoogle
images
ime_base
ime_jp
ime_open_source
interactive_media_ads
knol
labs
latitude
local
mapmaker
maps
maps_engine
maps_for_mobile
mobile
mobile_app
moderator
music
mydevices
myhomepage
news
notebook
offers
open_source_programs
orkut
pack
pagespeed
panoramio
partner_programs
partner_search
patents
peoplemode
photos
picasa
picnik
places
play
playn
plusone
plusone_resting
postini
presentations
projecthosting
qna
reader
recipe_search
research
schemer
scholar
scholarship
search
search_developer
search_for_mobile
search_pointer
shopping
shortlinks
sidewiki
sites
sitesearch
sms
spreadsheets
statement
storebuildertalk
tasks
toolbar
transit
translate
tvads
v8
vault
videos
voice
wallet
wave
webelements
webmaster_tools
websearchfeatures
website_optimizer
youtube
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