This toolkit help reduce some of the pains for SharePoint administrators, especially managing ever growing Site collections. It contains two important functionality:

• Batch Site Manager, which can be used by an administrator to manage and administrate bulk operations for moving, deleting, and locking site collections within a SharePoint farm.
• A new Stsadm command-line tool operation called updatealert that updates alert e-mails when the Uniform Resource Locator (URL) for a Web application is changed

Whitepaper is available here. (Binaries are soon to be available...)