Oh and much much more.

I'm currently in the process of making a detailed guide (with screenshots and such) to get around certain restrictions....

Skype charges for calling out.
GV+Gizmo no charge.

This is 100% free* VOIP (I'll explain that) to Gizmo5 users, cellphones and landlines.

Google Voice isn't an all-inclusive service. It requires a "middleman" be that a cellphone, landline, or Gizmo5 account.

You can also "pipe" it through more than one such middleman services or apps. Asterisk for example.

There are going to be a lot of uses for GV in the future, people just need to figure them out (and/or create middleman/mediums for new uses).