I'm not a shill for Skype but it has reduced our company's monthly expenses. Members of our dev team are geographically spread out all across the country and our guys stay in constant contact with Skype; we prefer it to IM because voice is more immediate than typing and their hands are free to work (code) or, if you know anything about our product, do 'other' things:-) Instead of the variable cost of long distance charges, we have the one-time fixed cost of a good quality USB headset for each employee -- the choice of headset greatly affects the voice quality of the calls; we've found that the Plantronics DSP 500 provides superb voice quality at a relatively inexpensive price.
Get your pitchforks and torches...
I'm not a shill for Skype but it has reduced our company's monthly expenses. Members of our dev team are geographically spread out all across the country and our guys stay in constant contact with Skype; we prefer it to IM because voice is more immediate than typing and their hands are free to work (code) or, if you know anything about our product, do 'other' things :-) Instead of the variable cost of long distance charges, we have the one-time fixed cost of a good quality USB headset for each employee -- the choice of headset greatly affects the voice quality of the calls; we've found that the Plantronics DSP 500 provides superb voice quality at a relatively inexpensive price.