According to the Slut-O-Meter, a search on Skype gives a "Promiscuity: 12.34% (3800000 / 30800000)". This is the difference between the number of results Google returns with and without "safe-search" turned on. Other results:

• VoIP: 0.64%.
• Vonage: 2.08%.
• Voit: 3.1%.
• Phil Wolff: 3.1%.
• TiVo: 9.49%.
• Bill Campbell: 12.26% (yay, Bill!).