I bought a 2G card for my Nokia E65; I couldn't believe how small it was. I thought the 4GB SD card was amazing when I bought it.
Maybe I'm getting old, but I remember my first memory expansion for my home-built computer was a measly 4K (not 4M, just 4096 bytes!) of static RAM and cost me GBP25 (US$50) or in today's money about GBP65 or US$130. Now I can buy one million times that amount of memory for the same price!