It's a fair bet that those of you who come here on a regular basis are more knowledgeable about- or at least curious about - Internet telephony than the populace as a whole.
I guess that this holiday season, you may feel the urge to explain IP telephony to people you know who could use IP services.
If you feel the urge to do so, do not bring up the subject over Egg Nog. Instead, send them a link to USAToday.com's WonderQuest column. Author April Holladay's explanation of how Internet calling works is the most straightforward I have seen.