Imaging related:

• MRIcro
• SPM - neuroimaging analysis software
• FSL Software Library
• fMRI for Newbies

Organizations:

• Organization for Human Brain Mapping
• Cognitive Neuroscience Society
• American Academy of Neurology
• American Psychological Association
• American Psychiatric Association
• Association for Psychological Science

Blogs:

• Running a Hospital
• Carlat Psychiatry Blog
• Scientific Misconduct Blog

Misc:

• Dr. Silverman's Book (Released April 2008)
  
• The Unbranded Doctor