Something I'd like to see
I'm not asking you to give up fishing spots, but I'd find it interesting and useful if people would post GPS coordinates for some of the more distinct things they find in the water.
An example of the kind of thing I'd like to see would be this one that Kosmo posted:
http://i826.photobucket.com/albums/z...psf4ed6947.png
The reason I'd like to see the coordinates is that they would make excellent reference targets for people new to advanced sonars. If you have any doubt that your installation is good, you could go scan one of these targets and compare your results with what others have been able to produce.
I also think it could lead to some interesting discussions when several people post images of the same things.