I read about Orb’s V4S product on Scobelizer and Skype Journal. V4S is a good, free tool for sending voicemails to Skype and Outlook contacts.
V4S joins a whole bunch of products attacking the same or similar market (sending voicemails over the web): YackPack, Odeo Waxmail, vemail, Springdoo and even the humble slawesome.