Being web-based (and being in beta form still) I found SlideRocket to be nice, but way too slow! I really like the pics, vids, and flash they have, and especially love the Flikr photo co-op, but I just couldn't move fast enough with the presentation to really get the satisfaction I wanted. Once the system speeds up to get at least close to PowerPoint and other online presentation apps, I am excited to make SlideRocket my presentation creator of choice!!!