why not use a file sending service like yousendit.com, mediafire.com, sendspace, etc? upload the spreadsheet there, then post the link. a free yousendit account has the (potential) advantage of only storing files for 7 days - making sure that your readers only get the latest version. limited to 100 downloads, tho (realistically, the chances of getting 100 DLs is low).
and not, i'm not getting off your lawn.