CNET reports that Apple has sent notice to a few big-time security experts, including some folks who've attacked OS X security in the past, to check out the developer preview of OS X Lion. "As you have reported Mac OS X security issues in the past," the letter reportedly tells the researchers, "I thought that you might be interested in taking a look at this. It contains several improvements in the area of security countermeasures."
Note that this isn't actual consulting on the part of these researchers, though they are getting a preview copy of the OS for free. Dino Dai Zovi is one of the experts that Apple invited to check out the system, and he lauds the move on Twitter, stating that it "looks to be a step in the direction of opening up a bit and inviting more dialogue with external researchers."
Good for Apple, in that case. Hopefully the outcome of all of this is a more secure operating system, and we can all appreciate that for sure.