Feel in need to share a PowerPoint presentation with your family?
Alright, maybe you are in marketing and want to share your latest creation with everybody on earth.
I've found three services to do the trick: slideshare, authorSTREAM, and slideboom.
Slideshare is by far the most popular service with more than 450,000 unique visitors as of August '08 according to compete.
Both AuthorSTREAM and SlideBoom aim at providing richer functionality such as live presentations via the support for PowerPoint audio narrations.
I've uploaded the same presentation to all the three services to give them a try (I had to convert the file to PDF format before uploading to SlideShare as it currently doesn't support pptx).
Upload to SlideBoom was the fastest (I presume that's because their servers have some spare capacity as the traffic to the site is supposedly light) and SlideShare provided the best quality (I would guess the pre-conversion to PDF played a role here).
Although I'm missing keyboard navigation, I see no reason why I wouldn't use all the three services at the same time.
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