I stumbled across a blog from Unni, he is a program manager of the Expression Interactive Designer team. He mainly creates user interfaces and other experiences.
In his last blog he presented the Vista Sidebar which he ported back to Windows XP.
He will release the sourcecode of the sidebar to CodePlex when a appropriate version of WinFX ships. However it’s not an official application from Microsoft itself. Maybe Microsoft will catch his project and create an official sidebar for WindowsXP instead of Unni’s project. Or is Microsoft already working on a sidebar for Windows XP? Who knows…
So stay tuned!
Dennis Fraederich [MCP], a Microsoft Betatester
Contact via Email / WLM: mcgiga[at]web.de