Awesome new dromaeosaur was discovered recently from late Cretaceous Romania and described in this month's online preprinting of PNAS. Here's an article: [link]
The weirdest thing about Balaur bondoc
is that it had double sickle claws on each foot, with the additional claw being the hallux that evolution had modified into a retractable enlarged claw. It also had a reduced and nonfunctional third manual digit, unlike all other known dromaeosaurs.
Here's the Wikipedia article for anyone interested: [link]
[Edit] It now appears to be common belief that the first digit was not as hyperextensible as my original drawing so I edited it to reflect that.