Here's a great page on how to "re-parent" a SharePoint site. This allows us to move sites within SharePoint from one URL to another: http://blog.solanite.com/keith/Lists/Posts/Post.aspx?List=11564265-6153-4557-aee2-72d1f62fa4c1&ID=7
Here's a great page to answer the question: "What can SharePoint do?" It doesn't answer the question: "What does SharePoint do well?" (for example, I don't like wikis in SharePoint), but it is a start.