Are you on the lookout for a presentation application that is just a bit different? If so you may want to check out Prezi.
Prezi allows users to create interactive presentations which can include media and links(although you can't place links on media yet), as well as share/collaborate on the presentations with others. A really great feature is the download option, which allows you to run presentations from the computer and avoid any potenial internet glitches, links not withstanding. Media, text, basically anything in the presentation can be designated as a stop on a predetermined path, and each stopping point zooms in as one arrives at it. This is a great little app. especially for those of use who prefer not to think in a linear fashion straight off, allowing one to plunk down ideas, links and media, later grouping them appropriately, as the ideas develop. Consider the possibilities for brainstorming presentations in small groups! I am definitely going to trial this in one of my teaching groups this year, who have got to be in PowerPoint overload by now!
Note: Three main areas that the Prezi people could develop further are the ability to embed and/or upload presentations, as well as allowing users to link off of objects rather than pasting urls into presentations.
Here is a link to the my first Prezi, which I created as a follow-up for to BLC.