Here are the two most helpful LSS links I've managed to find...
Two pictures and some vague info...
http://www.s2elise.co.uk/tuning/handling/lss.htm
General suspension info, with LSS blurbs...
http://www.elise-faq.info/content/suspension/index.php
Questions answered by those links:
1. Looks like the lowering of the car is adjustable with LSS. I'd guess 20mm-ish, though.
2. Looks like the steering rack itself isn't different, but has a mounting bracket that lowers it to reduce bumpsteer.
New questions raised and thoughts seeded by those links:
1. What's a "steering plate"?
2. I hope the LSS wheels can be obtained in silver rather than black.
3. I hope that the adjustable bits of the LSS setup (spring platforms, roll bar) come with reasonable-default settings from the factory.
4. I've read that very firmly damped cars are more nervous/twitchy when navingating poorly surfaced (bumpy) twisty backroads than are more softly sprung cars. Is there truth behind this, or is it misinformation?
5. Will LSS cars compete directly with non-LSS cars in a stock autocross class? If so, what autocrosser in their right mind would opt out of LSS?