AFAIK, Richard Vobes (vobes.com) has the most shows at 1009 as of July 25th.
There *could* possibly be another with more, but 1009 is definitely a much higher goal to exceed unless Vobes packs up his beach hut soon.
although I LOVE THE SHOW (imagine a digitized voice there) I thought I would pipe in and mention that neither the Daily Source Code or BOL is the most prolific podcast at this date. Dawn and Drew are running at 784 (it would be more if they counted their videos in the feed). It is also not a daily show so BOL will most likely overtake D&D as well in time. But it's not the DSC you should be keeping track of if that the goal.