mirkazemisaman, I don't use bluetooth, so I can't give you recomendations on that. But, if you don't already have a bluetooth capable phone, you can check to see whether Socket has a digital phone card (DPC) for your phone. It uses the CF slot in your PPC, and the other end of the cable plugs into your phone. I used one with a Nextel phone and my Casio and was quite happy with it.
http://socketcom.com/product/dpc_card.asp
I've since changed to T-Mobile and a e550G, and I'm considering going with a CF wireless card, like the Audiovox.
http://www.ppcw.net/index.php?area=s.../10/18/3570253
But as you noted in your original post, there are PC card based wireless solutions as well, for either GSM/GPRS or CDMA services. What you choose is going to be based on which phone and which cell carrier you want or use first, and then on a little exploration into the various wired/cable vs wireless solutions out there that will work for your set-up. Good luck in your explorations!