Free Internet calls and video conference software

-once you have a free http://fwd.pulver.com account you can place a 'call me' link on your website to allow web-surfers to speak with you directly , 2-way voice, not just text chat,  just like a telephone call but free and right through the browser.
 
in fact take a look at : www.marratech.com ,  www.neosmt.com  ...and the grand-daddy of them all : the cu-see-me (now called cu-world) platform www.fvc.com  ....  they offer 'hosted' service and also allow you to install the 'server'.