Truphone, one of the first to enable mobile Internet phone calls over Wi-Fi connections, now includes free calls to and from Google Talk users. Here’s a video from their press blog showing Truphone and Google Talk in action. I like this demo because it is low tech, sans marketing shtick, and shows someone actually using the product.

A great example, blogger style, of how video can really communicate the nuts and bolts of a new product or feature. For lots of people, a free 30-day trial isn’t enough. They want to see it before they try it.

Truphone announced its beta software for Wi-Fi-enabled Nokia mobile handsets in September 2006. Currently Truphone is available for Nokia’s E60, E61, E70 and N80 Internet Edition handsets. Truphone for other handsets including Windows Mobile devices will follow soon.