Here are several recent press releases that discuss Pay Per Call:

1. "Pay Per Call - the Latest Internet Marketing Channel"
   www.businesswire.com
   
   
2. "California Marketing Company Specializes in Pay Per Call"
   www.prnewswire.com
   
   
3. "Merchants Find Success with Pay Per Call"
   www.datadirect.com
   
   
4. "Opportunity Calling"
   www.prweb.com