Making Free Phone Calls With Google's GrandCentral

andrewmin writes with an enthusiastic pitch for Google's closed-beta call-aggregation service called GrandCentral, for which we non-beta-testers can at least reserve a number. Specifically, he's using GrandCentral in combination with Gizmo5 to make free VoiP calls. Excerpted: "Most of the time, I'm at my computer. Or near it. And if I had an internet device like a Nokia N810 or an iPod Touch, I'd have it with me 24/7. And since most of the time I'm at a place where there's a WiFi network, it makes sense for me to use VoIP rather than a regular phone line. ... I'm talking about making and receiving calls that are completely free (that is, $0.00/minute) forever (that is, no 30-day demo) for as much as you want (that is, no 30-day trial or five hour/week limit)."