Upgrading a Web Part Assembly & Great SharePoint Resources

It seems that I'm not the only one thinking about scenarios where you have to upgrade Web Parts that are in use. Ian Morrish points in Tariq's post to a MSDN article that covers this topic:

Upgrading a Web Part Assembly for Microsoft SharePoint Products and Technologies
Summary: Upgrade a Web Part assembly for Microsoft Windows SharePoint Services or Microsoft Office SharePoint Portal Server 2003, including adding, deleting, renaming, repurposing, or upgrading properties for a Web Part.

By the way, Ian has a great site with a lot of information about SharePoint: WSS Faq. Another great site this time by Stephen Cummins: SPS Faq.