This new product from Adafruit looks like an interesting board to use with uLisp:
You interface it with an SPI interface, and it looks to the microcontroller just like an SD card. So the uLisp SD-Card interface should work exactly like it would with an SD card, allowing you to read and write files, and save and load Lisp images.
It has the advantage that it’s more robust, smaller, and possibly cheaper than the combined cost of an SD-card breakout board and an SD card.
Adafruit’s board provides 512MB and is going to be available for $9.50:
Adafruit SPI Flash SD Card - XTSD 512 MB
I haven’t had a chance to try one yet, but please report back if you’ve tested one.