Scott Kelby, of Photoshop Insider fame, recently posted this entry about getting his portfolio critiqued by Joe McNally (internationally acclaimed American photographer and long-time photojournalist). Twenty-five minutes later, he's learned things that will change his approach to photography going forward.
In the Boston Globe's online edition boston.com, there is a regular blog called RAW, written by the Globe's photo staff. Included is an option to submit a mim-portfolio of 5 shots for critique. Pulitzer Prize-winning photographer Essdras Suarez recently critiqued local high school student photographers' work here.
My point is that getting honest feedback, good and bad, is critical to producing good images. The way we look at the world is constantly evolving and we can always learn something new about technique. By having our professionals, teacher, peers and even non-photographers give feedback on our work, we can learn something. I post photos regularly to myshutterspace.com and I welcome the feedback I get there. I have yet to venture into one the groups that is dedicated to hardcore critiques, but that's a fear I need to overcome.
Seek out photography clubs where you can get critiqued on a regular basis. At trade shows and conventions, look for the pros. For instance, pros like Joe McNally will do a free critique of your work at the upcoming Photoshop World in Boston.