2010/9/8 River Tarnell river.tarnell@wikimedia.de:
Here is the per-user usage report:
cmarqu : 492.62G in 126629282 files
These are the hillshading tiles used in e.g. http://hikebikemap.de (and some other sites as well now). I had made a rather unsuccessful attempt in re-packing them into metatiles in the past, which I could try another time if the number of files became a problem (which you said wasn't, back then).
Cheers Colin