Optoma as a company still exists but the Thin Client division seems to have vanished into the mists of time.
"Optoma is a world leading designer and manufacturer of award-winning projectors for Business, Education, Professional Audio/Video and Home Entertainment, with comprehensive ranges to exceed the expectations of every user."
The Optoma Group has continental headquarters in Europe, the USA and Asia; whilst Optoma Europe Ltd, based in London, covers Europe, Middle East and Africa (EMEA), delivering local services from regional offices in Germany, France and Norway.
So far I've come across:
Optoma ST320E | 2003? | NS Geode GX1 | 300MHz | 32MB | 64MB | PC133 | 0W | ~10W |