A new screencast (http://screencasts.smileonmymac.com/SCO170-pdfpen-Module01-832×468-h264_best.mov) offers an introduction and installation guide for PDFPen from SmileOnMyMac.
PDFPen is a PDF editing and form-filling tool for Mac OS X. PDFpen costs US$49.95, and PDFpenPro is $99.95. Family pack licenses, which cover up to five computers in one household, are $74.95 for PDFpen and $129.95 for PDFpenPro. Upgrades from earlier versions of either application are $25, and free to users who purchased after June 1, 2008. Upgrades from any version of PDFpen to PDFpenPro 4.0 are $50.