They aren’t saying much other than that the Gizmo5 team will join the Google Voice team, and that new Gizmo5 signups will be disabled.
One thing this gives Google – a much needed soft phone on the desktop for users to make calls through Google Voice. And integration with Google Talk is likely as well, which will let users of that service access the normal telephone system for inbound and outbound calls.
All in all this pits Google Voice nicely against Skype, which was also looking to buy the company. From the blog post:
Today we’re pleased to announce we’ve acquired Gizmo5, a company that provides Internet-based calling software for mobile phones and computers. While we don’t have any specific features to announce right now, Gizmo5′s engineers will be joining the Google Voice team to continue improving the Google Voice and Gizmo5 experience. Current Gizmo5 users will still be able to use the service, though we will be suspending new signups for the time being, and existing users will no longer be able to sign up for a call-in number.
We’ve acquired a number of small companies over the past five years, and the people and technology that have come to Google from other places have contributed in many ways, large and small, to all kinds of Google products. Since the GrandCentral team joined Google in 2007, they’ve done incredible things with Google’s technology and resources to launch and improve Google Voice.
We welcome the Gizmo5 team to Google and look forward to working together to bringing more useful features to Google Voice.