SmileOnMyMac has updated PDFpen, the PDF editing and form-filling utility, and PDFpenPro, which creates fillable forms, with new keyboard shortcuts and performance enhancements. Version 2.4 features: support for PDF comments; and display and navigate from a list of comments, notes and imprints. PDFpen and PDFpenPro require Mac OS X 10.2.5 or later and are priced at US$49.95 and $94.95, respectively.