I recently beta launched http://exquisitejobs.com/ a job board where all jobs are hand picked, and only the best hackers/freelancers/applicants get in (invite only) to ensure the highest quality for all parties involved.
I wrote this a while ago, but nobody ever seemed interested. I haven't seen if anyone thought this would be useful for 2+ years, so maybe the tides have changed...
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US:
Crunchboard http://www.crunchboard.com/jobs/
Startuply http://www.startuply.com/
YC Company Jobs: http://news.ycombinator.com/jobs
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UK:
CoderStack (Developer Jobs - run by me) http://www.coderstack.co.uk/startup-jobs
Mind The Product (Product Management Jobs) http://mindtheproduct.com/jobs/
Work in Startups http://www.workinstartups.com/
Enternships - (Startup Internships) http://www.enternships.com/en/enternships
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Germany:
Berlin Startup Jobs http://berlinstartupjobs.com/
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Canada:
StartupNorth http://jobs.startupnorth.ca/