PC Advisor has been investigating what the Web 2.0 revolution will mean for all of us. It's exciting stuff, but what could go wrong?

No net neutrality The US Congress is pondering whether to give big telecom companies the right to charge companies for a guarantee of faster access in a debate which is sure to have ramifications for the UK. This may lead to small, innovative new companies being crowded out by the Microsofts and Googles, which can afford to pay for good access.

Copyright complaints In August, the reporter who caught the Rodney King beating on tape sued YouTube because someone uploaded the video to the site. In another worrying trend, Universal Music may sue YouTube and MySpace over users uploading copyrighted video. Kill the messengers and we could lose vital outlets for public opinion and discourse.

Security concerns The growth in the number of consumers who are using online banking has slowed, in large part because they're worried about online security. Banks have investigated concepts such as using secure RSS feeds, which would allow you to receive, for example, credit card activity alerts in a feed. Technologies such as these will be essential if we have any hope of finally creating a trustworthy internet.

Constricted connectivity Upstream bandwidths are still constricted, making uploading things such as video files a time-consuming task. Furthermore, usable mobile bandwidth still costs an arm and a leg, and some carriers impose annoying limitations on how you can use the web.