I Love Keynote. You should too.
A site about using Keynote as a design tool to mock up UI designs, a place to download beautiful themes, tips and tricks, resources, and interesting articles, etc.
ilovekeynote.com is the brainchild of Ted Boda who spent 5 years at Apple as the lead UI designer for Keynote on the iPad, iPhone and desktop, and is currently the lead UI designer for all mobile devices at Netflix. Ted started his design career at Duarte Design with Apple as his main client. He also worked one-on-one with Al Gore, to help create the compelling and impactful slides that were the basis for the Academy Award winning film, An Inconvenient Truth.