Mary Jo Foley links to some new SharePoint application templates available for download from Microsoft. Check out the full list on the download page for more information, but there's a ton of useful stuff here:
Applications for Windows SharePoint Services
These application templates are tailored to address the needs and requirements for specific business processes or sets of tasks for organizations of any size. The applications are the first out-of-box custom scenarios for the Windows SharePoint Services platform, though they also provide a starting point for partners and developers looking to build deeper Windows SharePoint Services solutions.