1. How can the laws of libel be adapted to a constantly changing Internet?

2. Based on what you know about libel, what do you think? (Please relate the answer to the disclaimer of Twitter).

Twitter's Disclaimer: We claim no intellectual property rights over the material you provide to the Twitter service. Your profile and materials uploaded remain yours. You can remove your profile at any time by deleting your account. This will also remove any text and images you have stored in the system. We encourage users to contribute their creations to the public domain or consider progressive licensing terms.