"Hoarding" is definitely a topic in the air--why are we suddenly obsessed with obsession?
There's the TV show Hoarders (Bill Schwarz says they need to meet the Pickers--ha ha).
Wikipedia has an entry on digital hoarding.
Seth Price in his entertaining but incoherent Teen Image essay also talked about hoarding in the digital context.
OK, that's all, gotta get back to my stuff.