The FlashPath FDD adaptor that I have works well. Not cheap though. DOS/Windows just sees it as an ordinary stiffy. Reads are slow, writes even slower, but not noticably slower than a serial connection. Saves a lot on the camera batteries. Otherwise plug camera into mains adaptor during file tinkering to avoid subsidising the battery makers.
USB or Firewire connections are much faster, but not all cameras have 'em and & not all PC have Firewire (or USB for that matter).