Slideshow sets for this year’s WordPress 101 and WordPress 201 sessions.
One of the things you can do in the Vertex theme is put a WordPress widget anywhere you like. These can be just blocks of text, or they can utilize any of the features that your plug-in set might provide.
Here’s a very detailed article from WPMU on various tactics and options.
Even if you’re running a private blog, your file attachments aren’t as secure as you might like. Your or your users can innocently copy-and-paste a link to a PDF file into an e-mail … which gets passed around … then somebody puts it in a Twitter or Facebook post … and before you know it the file you wanted to keep just for your selected audience has been indexed by Google!