I guess this is news because it affected a prominent website, but I wonder if it was intentionally chosen - seems to me like parasite hosting attacks are pretty much automated and done in bulk these days.
This type of attack is most likely automated. The reason climatecrisis.net was attacked is probably purely based in its high PageRank.
Many other sites have been compromised in the same way with spam links pointing back to the same site. All of the compromised sites I've seen run older versions of WordPress. So it appears that the attack is exploiting and old security flaw in WordPress.
[edited by: Robert_Charlton at 6:35 pm (utc) on Nov. 29, 2007] [edit reason] removed specifics [/edit]