Just came across the eKo range of commercial products by Crossbow. Interesting how the eKo and Jee-Node/-Hub/-Mon designs almost exactly overlap – well, seen from a large distance anyway.
Their “JeeNode”:

Their “JeeHub”:

Their Linux server hardware and software:

Of course the eKo products are a million times more mature and advanced than the Jee-stuff which isn’t even a product, but still…
Looks like the eKo Linux (“Gateway”) server is a Linksys NSLU2. Photos of it in their user manual even have the Cisco logo visible.
http://www.xbow.com/Eko/pdf/eKo_Pro_Series_Users_Manual.pdf
http://en.wikipedia.org/wiki/NSLU2
Yep – got one myself, re-flashed with Debian Etch. It’s one of the platforms I have JeeMon running on (i.e. a tclkit starpack).