With a flurry of activity today, bidding on the charity auction for a coffee meeting with Tim Cook at Apple's headquarters has passed $500,000, nearly doubling the previous record for a CharityBuzz "experience" auction set last year when a bidder paid $255,000 to spend a day with Bill Clinton. The bid list seems to be a combination of serious bidders and those likely simply seeking visibility for their names or brands and relying on the fact that there are 18 days left to bid to hope that they won't a
