On the eve of MacWorld 2009, Google has finally gone and released a Mac version of Picasa. Picasa 3 for OS X is a beta version of the massively popular Picasa photo management software that Windows users have been enjoying for about five years now. If you are unfamiliar, unlike iPhoto, Picasa doesn’t wrangle all your images into one area - instead, if finds them and leaves them where they are. If you move an image, it will know where it went. You can do simple editing, and since Picasa is a Google product, it ties in to all the other Google offerings in exactly the ways you are thinking. Yup, emailing photos using your Gmail account, uploading videos to YouTube, and sending both photos and videos to the free Picasa Web Albums service, where you can then share them with friends, the world, or keep them private.

Picasa is free, and you can grab it immediately.