From FreshAir:
http://www.npr.org/2011/03/17/134619750/how-offshore-tax-havens-save-companies-billions
"You have an Irish operating company out there selling ads - they actually have real employees in Dublin," he explains. "They make payments to a Dutch subsidiary with no employees, which in turn makes payments to a Bermuda-headquartered Irish company with no employees. And the result of all of this is that it all helps to cut about $3 billion in Google's income taxes in the last three years."
Smart, they got it made for sure.
Uncle Sam isn't going to like that...nor will he like looking stupid in the media
Accountant's view on this (2009):
http://www.taxresearch.org.uk/Blog/2009/04/19/googles-tax/
QuoteRichard Murphy, the accountant who investigated Google's UK, Irish and American accounts for The Sunday Times, also found: Google avoided a further €135m (now £119m) in tax from Ireland during 2007. The search engine's Irish subsidiary is owned by one of two companies Google has set up in the tax haven of Bermuda. Several sets of Google's UK accounts were filed late, with one set of accounts outstanding by more than five months.