Because Q2A lacks features to give services for registered user, I think that it is a good idea.
However, in current Q2A, global information is given priority to over information about registered user. Probably, that navigation is placed near of "My account / My favorite / Wall / Recent activity / All questions / All answers / ???". In that case, this feature will not be used very much.
For example, I made dashboard plugin before. I am stopping development of this plugin. But, we may be able to make more personalized QA community by combining those features with this plugin.
This is my opinion.