Not exactly. The PrepCard utility will only support cards up to 4MB. But, using a driver like CFD you can use flash media of very large size (I've used 16M).
You can usually find suitable PCMCIA SRAM cards on eBay. I have a 4M card with battery for my A600. In OS2.x when you use the card as memory you also get BATT_MEM: (or was it BATT_DISK:) a recoverable 880k RAM disk. I've been toying with using this as a quick bootdisk to run relokick, etc.
