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Currently this is not a core feature, nor is it likely to be supported in imminant releases. However, as an alternative, Solo71 is developing a new module called Myedito that allows users to create their own personal pages.
The module also allows a certain amount of templating that could include details about the user etc. Each edito can also be commented as you request.
There is a thread going on the forums right now about MyEdito, icluding a demo online.