> Olins recommendation of Data Tehnik and Djula Djarmati (on 
> this list) bears repeating (so I have, below).

That's me, thank you Russell.

The electronic part seems quite simple - from your description the PCB 
and assembly would be quite cheap (<$1). Can it fit on 1-layer board?

A bigger problem is the housing. The tooling is expensive but not 
terribly so since it's a small part - I imagine it will look like USB 
disk? What about the battery holder? How many LEDs? Any buttons/switches?

I have no idea where to get the chain itself.

You may also want to check the archives - someone wrote about good 
connections with manufacturers in China/Taiwan, IIRC this person was 
looking for a job.

Djula
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