Slideshare for the Enterprise?

I just wanted to repost my comment on RWW's post on Slideshare 2.0. Sarah Perez gave a nice overview of the new web Powerpoint apps.
However, what I've been looking for for some time is: Slideshow 2.0 for the enterprise.
Do you know of commercial and/or open-source alternatives of a slideshare-ish platform for the enterprise?


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