by RHYEN COOMBS, LISA PICKOFF-WHITE and ELIZABETH SHEMARIA. Bay Area residents gave over $26 million to Barack Obama’s presidential campaign, making our region one of the nation’s most concentrated centers of donation to Obama’s candidacy. This multi-media close-up, produced by reporters in the U.C. Berkeley School of Journalism’s advanced multi-media program, invites you to track the buildup of money, compare Obama donations to those for previous campaigns, and hear the voices of people who chose to contribute to the 2008…