scotland - 9:19 am on Feb 4, 2010 (gmt 0)
Did the cold war ever go away or did it just change technology? There is probably several governments involved plus criminal elements.
When Governments in the UK and US probably monitor Internet traffic and most communications then one way they will go about it is by compromising security of the networks involved.
... so it may not just be China that is involved in hacking companies, look closer to home.