Oh yes, another well-researched article from Spiegel Online. Still prominently announced in the article's headline: In 2005, the numerical address book is full - but nowhere in the article is there evidence for this absurd claim. Nowhere is there mention that even through the return of some large (Class-A) networks more addresses are now available than were previously expected for that time, nowhere is there mention that even more Class-A networks exist as reserves that could also be drawn upon, nowhere is there mention that through CIDR (Classless Inter-Domain Routing), NAT (Network Address Translation), and dynamic address assignment for dial-ups the problem of limited address space has been significantly eased, nowhere is there mention of whose numerical address range is actually supposed to be full and who has claimed this based on what data.
For those who prefer facts and numerical models as the basis for such claims, I recommend the very good article at ISP Column - here various models are presented showing how the address space is viewed. Depending on the model, the point of exhaustion lies between 2019 and 2029 - so still quite some time, time being used to establish IPv6. Well, dear Spiegel Online journalists. The Internet is full. Just go somewhere else.
At Spiegel Online: Netzwelt there is the original article.