Went through the whole interview process, including spending a weekend creating a test project for them.
They did not give me an offer which is fine, but they couldn't even bother to call or write me an email after all the time I spent interviewing. Just one of those canned responses: "While your skills are certainly impressive, we have decided to pursue other candidates...."
If someone spends hours interviewing with your company and writing code, at least have the decency to write a personal response. This is lazy and insulting.