According to a Skype developer, an old and unstable version of Skype for Mac has been leaked onto file sharing networks across the globe. If you spot this file, do not download it! "It is an internal unstable development version, and thus it is extremely buggy" and "it will destroy your contacts and other data". We wouldn't want that now would we?
Since the Windows version of Skype gained video conferencing support in March, many Mac user have felt left behind and stuck with the non-video capable version of Skype. Fortunately, this warning also comes with some good news; Skype version 2.0 for the Mac is nearly ready for primetime. The screenshot of a video capable of Skype on the left of this post is the tantalizing proof.
So, try and resist the temptation to go searching for a pre-release version that could potentially destroy your Mac, and wait a little longer for the official version. Remember what happened the last time someone bit the Apple?