Andy Powell comments on the DOS launched on Slideshare recently, seemingly in relation to presentations about the situation in Tibet. (He also noted how quickly someone from Slideshare emailed him, after he’d twittered about it.
This highlights not only the problem of putting material on Slideshare (though the VLE at work has been known to go down, nothing is 100% reliable!), but also the impact that others can have on “open systems”. We get used to a service, and it goes away.