There is a survey being done on hobbyists that looks like it would be of some real value. There's no linkage between the hobbyists and the survey. I highly recommend anybody over 60 take the survey. They'll need 200+ responses in order to have enough data points to do a true sampling. Thanks, Phil
NOTE: When its done they'll send me a copy of the analysis. I'll be glad to share it with all that's interested.
http://eccie.net/showthread.php?t=925158
NOTE: I also posted in SA.