Give it a try and the first thing you will notice it looks awesome, especially for the Mac fanboys out there. This is not very strange because it's made by 280 North Inc., on a mission to create rich internet applications using their Cappuccino framework, by some referred as Cocoa on the web.
It's simple, intuitive and feels rock solid. Often when using click, select, drag and drop in the browser you feel some lack, but in this case it really feels robust and you really forget you are working in the browser. The functionality is simple and definitely enough to make professional presentations, it could get a place in my online toolset to regularly work with. It supports in and export of PowerPoint 2007 presentations, what also fits good with the corporate standard of my employer.
I did of course also had some glitches and as always I've a very simple feature request.
1. When I tried to upload my original 9Mb Predictions 2010 presentation it stopped after 25% and nothing happened.
2. When I uploaded a smaller presentation I didn't have this problem, but all my layouts got messed up. For each slide I again had to select the right template slide.
3. It doesn't allow me to maintain a slide master, what is an absolute minimum requirement, because the build in templates are too limited.
Like what I saw with Online PowerPoint you can only have 1 presentation open at the same time. In practices this is not how I work. I frequently create presentations, but never start from scratch. I reuse 70% of the slides from other presentations and create 30% new content. Quite often this 'assembly' process requires me to open 5-6 presentations at the same time.
Sharing and collaboration are the key differentiators for an online presentation tool. Microsoft, are you also listening? 280 Slides offers native publish to SlideShare and embedding into other applications (you find the demo here if it doesn't show up below). However I've not found how to work on the same presentation with multiple people and how to have others reviewing the presentation without having to download and email it around.
I'm very curious to learn where 280 Slides is going. Unfortunately I'm not very confident, because the 280 North blog and Get Satisfaction are not very active. Does anyone know more about this?