For anyone that's interested, Iruka (http://irukatheslayer.deviantart.com/) has been compiling a bunch of my forum critiques of other people's art on her blog. What I do for these critiques is usually use them as a platform with which to explain broader topics, rather than giving 'move this here, make that more red, etc.' type advice, so a lot of people over the years have told me they've found them helpful as art lessons, even if it's not their own work being scrutinized. Check 'it out:
Painting and Light:
http://art-anecdotally.blogspot.com/2010/12/kevin-oneill-part-1-painting-and-light.html
Simplifying and Dynamics:
http://art-anecdota