Whistle - Free VOIP # and Calling - SIP Accessible

[pringlet]

Thought I'd post up this killer free VOIP service. Differs from gmail calling in that you get your own phone # and can receive (inbound) calls <free as well>. Differs from Skype/Gizmo in that outbound calls are free, dial direct.

What is Whistle ?
Whistle is an easy-to-use phone service that you can use anywhere on your Mac and Windows PC AND OTHER SIP CLIENTS. Make FREE phone calls to anyone in the US, plus save on your international phone calls with our low calling rates. All you need is internet access through a wired, wifi or 3G connection! Whistle allows you to make and receive crystal-clear phone calls, whether you're at home or on the go. Download it now and start experiencing next generation phone service!

This is legit. I've been using it for a couple days and the voice quality has been great. The service is supposedly ad supported, but I have yet to hear an ad. They do tell you about their international pay service for about 10 seconds at the start of each call. Otherwise it's been completely ad free.

Also, I was able to get it working with SJPhone (trying fring as we speak). You can dial out directly from the application.
*Set your proxies to proxy.whistlephone.com
*User name to you whistle #
*Password to your whistle password

Links:
Whistle:
Whistle - Free Phone Calls to Anyone in the U.S.
SJPhone:
Free softphones for Windows, MAC, CE, LINUX

Enjoy and provide any tips/tricks/feedback etc.

pt