Would linking to the image on an external website be a solution to overcome posting the occasional landschape image above 200 kb? When you are not a BPN member, this is the only way to post images. As long as there are no limits provided by the website that hosts the original image (Flickr, or your own site for instance), I think this would work. My guess would be that file size limit is only an issue when uploading an image to be hosted on the BPN server, but please correct me if I'm wrong.
Btw I recently posted a landscape image with very much fine details, which I had to compress below 50% to meet the 200kb limit. This amount of compression caused all kinds of artifacts to appear in the sky, which were not there above compression of 55%. Whether or not this will happen will probably also depend on the quality of the original image and the camera used. Since Arthur has very good technique and shoots the 1D, I guess he's not likely to run into trouble (which maybe the point of his remarks

).
Here's an enlargement of a piece of sky from this post (
http://www.birdphotographers.net/for...71-Lonely-tree). Left is the 'Save for web' version at 100% quality, 1000px wide, size of the whole image 949 kb, right is 'Save for web' at 46%, also at 1000px wide, just meeting the 200 kb limit (file size 204 kb).