I use a an SD card, SDHC Class 6 to be precise of 32GB capacity that i bought in ebay like 3-4 months ago at $US 28 including shipping. Also bought the cheapest ide to SDHC adapter at about less than $US 10.
I use an A1200 with a standart buffered ide interface (no extra speedup), and it works nicely with the SDHC card and its adapter.
You can even place it instead of the internal floppy on a desktop A1200 and it will fit nicely.
There are also two nice alternatives on that aproach that i find cool:
1-There is an expensive, but otherwise really cool ide multi card reader. It is the Addonics Digidrive, that can be placed in a standart 5.25" tower bay.
2-There is like a $US 12 pc bracket ide to SDHC adapter for those with a tower, that want to change SDHC cards thru the back of their case.