Voter Activation Network--the voter-information database company that designed the interfaces for the voter lists maintained by the Democratic National Committee, America Votes (using the Catalist database), and more, and which has previously used Palm Pilots to help canvassers--now has an iPhone app.
It's called MiniVAN Touch (hah! Minivan.) and it's available on the App Store; it works on the iPhone and iPod Touch platform.
VAN databases are disseminated by progressive groups, for instance, to Democratic campaigns, and VAN-created interfaces are commonplace; meaning this iPhone app has the potential to be very widely used by Democratic campaigns.
iPhone canvassing is something of a new wave: the GOP campaign tech firm
Republican Web Development recently released its own
app web applet for smartphones (complete with GPS functionality using the Google Maps interface) called
Walking Edge, which was used for the first time by the Scott Brown
campaign in Massachusetts.