Although I was leaning towards deleting the CRW files, I might just compress them and hold onto them a bit. That way if dcraw or other software adds support, I can compare the results. I'll also throw in the origianal JPEGs and the converter into each zip file, so I won't have to hunt it down if I ever need to recover the RAWs.
When I have some spare time, I'll put togethor an autohotkey script to automatically copy, convert, and archive images straight from the memory card. That would make my life much easier.
Thanks for your replies!