SlideRocket

SildeRocket is yet another tool for sharing slide presentations online, along with Slideshare and Google Docs.

Like Google Docs presentations, you can upload existing PowerPoint presentations, or collaborate with others to build a presentation together on-line. You can share the presentation only with those you invite, or publish to a URL for all to see. Like Slideshare, you can add audio (though synchronizing it to the slides is problematic) .

SlideRocket has a few advantages over the other two options I've mentioned. Primary among them is that it converts the slide graphics and text using Flash, so the visuals are crisp and sharp. Similarly, the on-line space the presentation runs in is very pleasing to the eye. There are also a number of very cool graphics available.

The free version allows an unlimited number of presentations, and a 250 mb overall limit.

All presentations come with easily copy-and-pastable embed code. An example of an embedded presentation is below.