The 38xx series doesn't support any SDIO devices so the only option is to use the HP Compact Flash Expansion Pack if you can get hold of one (expansys no longer have them)
Maybe something like this
http://www.expansys.com/product.asp?code=IPCFMS or this
http://www.expansys.com/product.asp?code=124500
Then get a CF Wifi card like I did.