Just to keep ranting, this is a typical process that has been happening to me:

  - Get unsolicited email by recruiter. I ignore if it's generic but if it looks like they've read something about me I answer (now I demand company name & salary range upfront to save everybody's time)

  - Recruiter follows up asking for resume or call. I have linkedin complete public profile, blog, twitter, Stackoverflow, Github etc, with all linked to each other, almost never they notice.
  - If somehow I'm still interested and I can't get out of the call ("my favorite call hours is email"), I schedule for a short call. I always write short, clear polite emails.
  - Already here the communication stops sometimes. If there's a call they invariably want to qualify me with the salary question. I've used both the "won't say at this stage" and "inflated salary" strategies.
  - Next if there's a first company phone interview (basic screening/basic tech) I always pass it, tech questions seem too basic, we schedule remote tech interview
  - In the remote tech interview I tend to fulfill the objectives but maybe I'm too slow or I'm not good at communicating or something. They say they'll call me for the next interview.
  - Then they stop communicating.

This cycle has happened to me several times recently, with several of the HN's "Who's hiring" companies. Only company which replied with a result was Facebook (wasn't a perfect match in any case) and a company in Idaho, it seems people in SV can't be bothered.