Media Providers And Short Online Retention?

delfstrom asks: "Retention time for online reference material is decreasing. First it was Deja moving archives offline. Now try to find the AP story you saw on Yahoo from earlier this year about a judge's order against a CyberPatrol decryption tool. You can't, because anything older than 30 days is canned from news.yahoo.com. Likewise, certain online newspapers (not to mention any names) are removing content after a mere 7 days, though for $25 per retrieved article you can go back to 1977. This certainly goes against the philosophy of not breaking links. What responsibility do information providers have in maintaining articles that they post? In this era of electronic publishing, academic papers are beginning to contain URLs in the references. To what extent can we keep copies of such information and provide it to others?"