writes with this excerpt from ComputerWorld UK:"SharePoint is a brilliant success, for a couple of reasons. In a way, it's Microsoft's answer to GNU/Linux: cheap and simple enough for departments to install without needing to ask permission, it has proliferated almost unnoticed through enterprises to such an extent that last year SharePoint Sales were $1.3 billion. But as well as being one of Microsoft's few new billion-dollar hits, it has one other key characteristic, hinted at in the Wikipedia entry above: it offers an effortless way for people to put content into the system, but makes it very hard to get it out because of its proprietary lock-in. This makes it a very real threat to open source. For example, all of the gains made in the field of open document standards — notably with ODF — are nullified if a company's content is trapped inside SharePoint."
The article offers a slice of hope for getting around that, though, in the form of a new API for Google Sites which can slurp the data back out.