Hacking Skype: Cool New Book from O'Reilly

oreilly.com -- Online Catalog: Skype Hacks, First Edition

There are also a few free chapters that you can download from their Web site. For example, one chapter tells you how you can make Skype calls from your Web browser; e.g. skype:phone_no?call will bring up Skype and dial the number (don't forget the in the beginning if you're using SkypeOut). You can also put a ?chat after a valid Skype user name; e.g. skype:markehr?chat will open a chat window, and skype:markehr?voicemail will leave a voice mail for that user. Cool stuff!