Continuing on the topic of PDF files in Sharepoint, Eric Legault has a post on how to get the PDF files indexed so they show up in search.
As you may know, SharePoint includes filters to index many file types (Office docs, web pages, Tiff images, Visio diagrams, XML, etc.). What's missing out of the box is the ability to index Adobe Acrobat files. However, Adobe does provide a free IFilter for download at http://www.adobe.com/support/salesdocs/1043a.htm. This IFilter works for both SharePoint 2001 and 2003 and will scan readable text in Acrobat files for indexing.
Thanks to RobertK for the tip!