There is a program like kazaa for pocket pc its emule for pocket pc. http://ppcyoda.tripod.com/P2PClientforPocketPC.html This website will tell you everything you need to know.
my card came with my pocket pc but ive seen a sd/wifi card at staples so u put the card in your sd slot and u have a wireless card
I found the website about the card i was talking about. http://www.staples.ca/ENG/Catalog/cat_sku.asp?CatIds=,&webid=592662&affixedcode=WW
Its not kazaa as i stated at the beginning it is a p2p client. It is actually lphant for pocket pc called mopiphant. And no mopiphant has no viruses, as far as i know.