True, I had no problems with my Asus Spacelink WL-110 card. However I did choose it because it uses the Prism 2 chipset. I think as long as you stick to cards based on that you should be OK. I don\'t think this is a major omission on the part of Sharp. It does seem that most cards run on Hermes or Prism 2, so those are the obvious candidates to support.
Depending on how brave you feel, there is a driver out for the Symbol CF card:
http://www.hpl.hp.com/personal/Jean_Tourri...html#SpectrumCFOr you could just sell it on Ebay and get a Prism 2 based card for USD 30-50.