Keynote ’09 was announced by Phil Shiller on January 7th, 2009 during the MacWorld Expo 2009. You can try out the fully-functional, 30-day trial of iWork ’09, of which Keynote is part of. Click the thumbnail to view a movie showcasing the available transitions in Keynote ’09:
From a 20-in. aluminum iMac to a 2.4 GHz, 15-in. MacBook Pro (2008) and 2.93 GHz iMac (2009)