BDC Tool!
Have you ever tried to handcraft the SharePoint Business Data Catalog (BDC) metadata? Labour intensive, to say the least.
A major update to the MOSS (Microsoft Office SharePoint Server) and WSS (Windows SharePoint Services) SDK's now includes a GUI-based tool for crafting the BDC metadata. I believe, a major relief for BDC enthusiasts!
Both the MOSS SDK and the WSS SDK is publicly available for download.