Bunkr has latched onto a need; to take presentations from the desktop into the cloud.

They've taken a different route to Prezi and Slideshare and seem to be concentrating more on facilitating a slideshow that is comprised of a series of online resources.

Its an interesting approach and quite different to the others who have relied on making their presentations slicker and more shareable (although I find Prezi's navigation can be rather nausea-inducing).

It's far too early to say who's on a better track but it's good to see a properly new approach. And there's likely plenty of room for both.