I just got a viewsonic v36, but have looked at quite a few models of pda's Most of the higher model/higher priced pocket pc's have both a cf slot and sd slot for expansion/memory cards. A lot more add on devices use cf right now so if you are planning on using wifi, blue tooth, or gps cards along with an additional memory card I would find one that has both slots. Most models of pda's right now just have a sd slot which sucks for two reasons. First is most add ons right now are for cf slots and secondly if you are using a sd wifi card right now you can't use have any extra memory for your pda because the only slot your unit has is being used. This of course will change around mid-year when sandisk brings out there sd+256meg sd wifi card. Right now they already offer a cf wifi and cf wifi+128meg card.
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