yes there are special typf of memories, normally SD cards are suported by every palm/iPAQ, but I think sony's a little longer in size. and any manufacturer's can do. but better to buy a medium manufacturer.
youn can get very very cheap hand held softare on eBay.
else there are sites, helpijg out (use google), I'm on iPAQ, else i would have helped u twice.
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"