Upon Apple’s announcement of a new iPhone – the iPhone 3G S, slated to be available June 19 – Nielsen takes a look at iPhone insights on its users and usage.

As of April 2009, Nielsen estimates that there are 6.4 million active iPhone users in the U.S., up from 2.1 million a year prior. The most impactful iPhone announcement this week may be the price reduction of $99 for the 8 GB version: cost has been one factor (in addition to AT&T exclusivity) that’s kept the …

Barack Obama’s campaign made political history when it used text-messaging to announce Joe Biden’s V.P. selection to 2.9 million mobile users.  Obama’s campaign also maintains a mobile website with news, video, and downloads.
In contrast, John McCain’s campaign has largely eschewed mobile marketing.  But that may just be the right strategy, according to Nielsen Mobile, which reported Monday that mobile advertising is a more efficient way to reach Democrats, rather than Republicans.
As of the second quarter of 2008, mobile media of all types were slightly more popular among Democrats, who were …