Not really, no. They have an onboard cache of some webpages but that's a waste of space. They also have some sort of store & forward email system which requires you to open a new email account. Details here:
http://www.cathaypacific.com/intl/in...on/0,,,00.html
This is probably the weakest part of CX's onboard service in the premium cabins - as far as I know they haven't yet announced any plans to get ahead of other airlines that are now trialling true internet access.
Having said that, they do have audio/video on demand with about 25-30 movies, 20-ish short features, 100 CDs of audio, plus the usual "channel" type stuff. Details here:
http://www.cathaypacific.com/intl/in...nt/0,,,00.html
So you might not miss the 'net access.