It occurred to me that one thing you can do is put a Creative Commons license widget on your blog. If you go to mine you will see it in the right hand widget bar at the bottom. I looked at your site (nice site) and see that you have the link to the Photographers' RIghts Group, but that is a group and some people might not notice it as much as a CC license.
I always tell people about http://compfight.com - a great tool to search Flickr by license and a great way to get good photos legally. I think that linking back and (if necessary) getting permission is only right. Even if a photographer has made the photo available asking only for attribution, I will try to contact them when it is up to let them know. They are always most appreciative.
If I see a great photo with all rights reserved, I will sometimes try to contact the photographer and ask to use it with link backs. With one exception, the answer has been a grateful yes. We both win: I get a great photo and they get credit and, with luck, some traffic back to their sites.
Anyway, good luck with it. I might be contacting you in the future to get permission to use one of yours - they're great.