One thing I forgot to mention in my last RYO VoIP entry: you can use GrandCentral and your Gizmo SIP phone to make free outbound calls, too! While in beta, when logged in, GrandCentral allows you to initiate a call from their website. Go to your Contacts page, click on the the number of the contact you want to call and on the resulting pop-up, select the number you want GrandCentral to call you on. GrandCentral will call you and, when you’ve picked up, ring your party.