There are a few auctions for PC-133 1GB 144 pin SODIMMS on eBay http://search.ebay.com/search/search.dll?sofocus=bs&sbrftog=1&dfsp=32&catref=C6&from=R40&satitle=pc133+1gb+sodimm
Would these work in a Pismo? I know Apple said that only 512MB would work originally but 1GB DOES work.
Is it possible these are 'double density' or something? I know we ran into that problem on an old PC once; 256MB ram sticks only being recognized as 128MB.