To read a memory card directly on a PC, if needs to have a FAT file format as in the case of the DOSonChip. Note that the Microdrive, as mentioned in the second post does not have FAT so you cannot read the card directly on a PC.

The simplest solution is to use a PIC18 to write directly to SD/MicroSD or Compact Flash using FAT16/32. You can create CSV files for reading by Excel. I would recommend going with SD or MicroSD (instead of compact flash) as the physical interface to the PIC is simpler (uses much fewer lines) and the cards are smaller and less expensive.