Presently
Google has just released its new online 'powerpoint' tool which they've called Presently. This is the latest in their suite of Google Docs - and I'm sure will receive a lot of attention. I had a go at creating a short presentation which can be accessed here. The basic tools are all there for creating simple presentations - and the fact that presentations can be jointly worked on and edited, together with the fact that you will be able to interact with others during the presentation using Google Talk, will make it something I'm sure many will want to experiment with.
If you're new to Google Docs, watch the video below from Common Craft to learn more about creating and collaborating on documents (and now presentations!).