Psychology

General:
PsyBlog: The blog you're reading right now—you should subscribe to PsyBlog here.
MindHacks: links to psychological goodness from all around the web.
(Now inactive) Cognitive Daily: in-depth coverage of cognitive psychology research.
The Last Psychiatrist: thoughtful, iconoclastic perspective from a practising psychiatrist.
Channel N: brain and behaviour videos.
BPS Research Digest: accessibly covers new psychological research.
(Now inactive) Encephalon: neuroscience/psychology 'blog carnival'.
Neurophilosophy: about molecules, minds and everything inbetween.
Neuromarketing: brain science in marketing and sales.
PsychCentral Blog: team blog, focusing more on clinical topics: depression, anxiety etc..
The Situationist: links to articles on social psychology.
We're Only Human: journalist Wray Herbert writes about the quirks of human nature.
Psychology Today Blogs: 'essential reads' from Psychology Today's stable of bloggers.
(Now inactive) The Frontal Cortex: by author and journalist Jonah Lehrer.
(Now inactive) All In The Mind Blog: companion to good Australian radio show covering mind matters.
(Now inactive) Frontier Psychiatrist: anonymous London-based psychiatrist critical of the profession.
Neuronarrative: psychology with a public health slant.
(Now inactive) Jena Pincott: science of love, sex and attraction.
Research Blogging: posts collected from variety of blogs but all peer-reviewed research.
In the News: forensic psychologist Karen Franklin on the intersection between psychology and law.
The Mouse Trap: musings on cognitive and developmental psychology.
(Now inactive) The Trouble with Spikol: mental health policy issues discussed by writer Liz Spikol.
Bad Science: Covers more than psychology but Dr Ben Goldacre is such good value we'll let him off.
More academic:
Dr Petra Boynton: sex educator and academic exposes media misrepresentations of science.
Babel's Dawn: exploring the origins of language.
The Neurocritic: anonymous, critical, mischievous.
Advances in the History of Psychology: it's all in the title.
Deric Bounds' MindBlog: biological view of the brain from an Emeritus Professor.
(Now inactive) Brain Stimulant: neurotechnology methods of brain stimulation.
(Now inactive) Social Psychology Eye: written by contributors to the journal Social and Personality Psychology Compass.
Child Psychology Research Blog: by clinical child psychologist, an expert on mood disorders.
Condition specific/patient perspective blogs:
Panic!: writer who's been dealing with panic disorder for 20 years.
(Now inactive) The Tangled Neuron: layperson reports on memory loss, Alzheimer's & dementia.
Beyond Blue: author provides guidance on how to get through depression.
(Now inactive) Walking the Black Dog: one person's battle with 'the black dog'.
(Now inactive) Postpartum Progress: advocate for women, Katherine Stone, on postpartum mental health problems.
The Secret Life of a Manic Depressive: Seaneen is a twenty-three year old Irish girl writing about her life.
(Now inactive) Autism Blog: autism research described by Lisa Jo Rudy, who has first-hand experience of the condition.
The Reality of Anxiety: Aimee, who suffers from social anxiety, promoting understanding of the condition.