sweet...the update to visual studio tools for office (vsto) has been updated and released! just updated on the office developer center, vsto 2005 second edition is released in beta form.
this represents an opportunity for visual studio 2005 developers to do some development on the office 2007 platform now much easier. what is great is the vsto team also created a tutorial to walk through some examples. granted the examples are very simple, but it gives you an idea of how to leverage things like add-ins, task panes, integrating with the ribbon UI. it's 58 pages of goodness to get you jumpstarted. get the bits and tutorial now!