Building on Howard Dean's fundraising strategy in 2004, Barack Obama's campaign plans to break the news of his vice presidential choice to people who have signed up to get e-mails and text messages.
That should then give Obama's team access to tens of thousands of cell phone numbers that could be used to mobilize voters under age 30 on Election Day.
Obama's outreach is the most prominent example of a larger movement by members of Congress and political campaigns to present their message and connect with voters through e-mails and text messaging, social networks such as MySpace and Facebook, and the microblogging site, Twitter.
But an Obama spokesman declined to release the number of cell phone numbers and e-mail addresses they've amassed.
Obama is expected to announce his pick within the next few days, before the Democratic National Convention begins Monday in Denver.