Although Skype has been working fine with OS X Lion -- heck, I used version 5.1 for last week's TUAW TV Live and it worked wonderfully -- the team at Skype has made another revision to the popular internet calling / video chat application.
Skype 5.3 for Mac OS X is now available for download and installation, and it brings several new features to users. Probably the biggest improvement is that you can now make HD quality video calls on Skype when using the "FaceTime HD Cameras" built into the newest iMacs and MacBook Pros or third-party HD webcams like the Logitech C910. Skype recommends that your broadband internet upload and download speeds be at least 1.5 Mbps.
Skype also made some changes to the user interface, making the Mac app a bit more like the iPad version of the software. It's billed as Lion-compatible, but doesn't include features like full-screen mode or multi-touch gestures.
If you're already a Skype user, you can download and install the update using the Check for Updates item under the Skype menu.