Yes I actually picked up a SanDisk adapter for $10 when I bought my j728 from Staples. Works just fine for using the CF wifi card in the PC Card slot
Note, if you haven't bought the CF wifi card, make sure which CF type it is. "Type I" is the thinner type that all flash memory cards are. However some CF wifi cards are "Type I"
(like mine
) while others are in the "Type II" format. Type II is thicker and won't fit into a Type I slot. Most PC Card adapters are for CF Type I only, so watch out for that.