Perhaps you should make one? I've seen comments across HN that go into more embedded-y stuff, i.e. people remarking on ARM based systems, etc. I'm also an embedded guy and browse HN quite often.
That's a great idea! Unfortunately I am more a FPGA and C guy. Would'nt know how to do a decent one I guess.
http://lobste.rs is very similar to HN and open source under a BSD licence. I'd be very interested in an embedded/electronics themed site and would be willing to help/lead with the creation of it if there was enough interest.