Sup!
-Taxation of services
Well, that's not a problem as there already are mechanisms that allow to raise taxes for commercial content.
-Finding things/navigating around
That's no problem as there are powerful search engines, and more sophisticated search engines working with support of artificial intelligence and information describing user behaviour gathered.
-Privacy
Privacy is an issue that is in discussion right now. the W3C P3P standard supports advanced privacy protection as well as national and international law.
-Lack of cultural diversity
Lack of what? You find everything in the net if you search it. The more technically advanced countries are over-representeted of course, but that doesn't mean there was a lack of cultural diversity.
-Encryption
Encryption is perfectly possible in the internet. The only problem is that most people don't care about encryption, and that national security agencies don't really like encryption too much ;-)
-Lack of linguistic diversity
There are even documents in Klingon language in the internet, so I can't see there was a lack of linguistic diversity...
-Censorship
That's of course a problem, as national law forbids different things in different countries. So some nations feel tempted to censor internet content that doesn't conform their law.
Greetings,
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