It is an interesting idea, but there are too many confidentiality issues involved. We can’t just release specific data like that for public consumption. I could go into great detail, but its not very interesting reading. Suffice to say, its not feasible in this form.
Just a side point, if your pool of appraisers willing to do this are the ‘out of work’ type, your results will most likely be suspect. Good appraisers are never out of work, there are usually good reasons why others are.
What would probably be more realistic and feasible would be an appraiser economic indictor. A formal survey given to a group of pre-screened appraisers (experience, education, license level, etc) that would somehow measure their perception as to what is happening in their market at or during a specific time. Similar to the consumer confidence index perhaps.
I’m not sure how useful it would be. Most of us would have been wrong for several years if asked to predict the top of this market. We are not fortune tellers and as sdrealtor pointed out, our opinions are only as good as the data we pour through and our ability to properly analyze it.