According to The Nielsen Company’s latest research on mobile applications, most mobile app downloaders are concerned about privacy when it comes to sharing their location via mobile phone.

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 …