Greenarrays is still going. They've made some new app notes.
I've found the 64x18b word limitation of memory per computer much less daunting than I did at the beginning, simply because how amazingly terse you can make your code. You also end up just simplifying, making your look-up-table or other array 8 or 16 words long...sometimes 32 or 64, but that's a bit more work.
One experiment I've done with it is harnessing 95 simultaneous cores for a virus vat, with a 47 core vat enclosure keeping it from hanging. The last 2 nodes are I/O and the probe to see what's going on. The virus is exactly one 18b word.
I've found the 64x18b word limitation of memory per computer much less daunting than I did at the beginning, simply because how amazingly terse you can make your code. You also end up just simplifying, making your look-up-table or other array 8 or 16 words long...sometimes 32 or 64, but that's a bit more work.
One experiment I've done with it is harnessing 95 simultaneous cores for a virus vat, with a 47 core vat enclosure keeping it from hanging. The last 2 nodes are I/O and the probe to see what's going on. The virus is exactly one 18b word.