A company called Xarios makes a nice, affordable CTI app to tie your PC to your phone.  Click-to-dial, on-screen call handling, drag-and-drop calls to ther users and much more.  I've never used with Salesforce.com, just Outlook, but their web site says SalesForce is supported.  Xarios.com, and you're looking for Phone Manager.  I believe they'll do a web demo for you