As you may or may not have noticed Mozilla and Microsoft have released new web browser (beta) functionality (in the first case as a Firefox plugin and the later as IE8 beta 2) with a focus of making mash-ups easier.
It is still very beta, however it gives you an idea of the near future webbrowser options.
Can someone shed a light on these new mashup features from a Alfresco perspective (Share/social computing). Is there any future Alfresco strategy that might take these new features into account?
You can start creating Ubiquity mash-up commands now for Alfresco using web scripts. In fact you should be able to reuse most of the web scripts from Share out of the box.