If you haven't seen already, the past two weeks have been great for paleontology on the pages of PLoS ONE, a high-profile open access journal. Phil Gingerich and colleagues have just published a paper on Maiacetus, a new fossil whale from Pakistan. Other bloggers have done a much more thorough job than I could of presenting the work and its importance for understanding whale evolution, so I'll just link to them and the original article.
It is good to see more paleo papers taking the open access route!
Gingerich PD, ul-Haq M, von Koenigswald W, Sanders WJ, Smith BH, Zalmout IS. (2009) New Protocetid Whale from the Middle Eocene of Pakistan: Birth on Land, Precocial Development, and Sexual Dimorphism. PLoS ONE 4(2): e4366. doi:10.1371/journal.pone.0004366
Read about it at Laelaps, Not Exactly Rocket Science, A Blog Around the Clock, The Loom, and elsewhere.