My good friend Ozh [1] has written an article entitled, What Plugin Coders Must Know About WordPress 2.6 [2]. It is a good read if you are a plugin developer for WordPress.
Both of us have came to a conclusion that if you move your /wp-content/ folder to elsewhere, you may need to manually specify the path to wp-config.php in the respective plugins that make use of them as there is no 100% way of guessing the path to wp-config.php.
So my recommendation is DO NOT MOVE the /wp-content/ folder. It is OK to move wp-config.php to a level higher, but try not to touch /wp-content/.
With regards to my plugins, I will release a .01 update bringing the version to 1.31 and 2.31 for the respective plugins. This update will make sure that the plugin will work for BOTH WordPress 2.5 and WordPress 2.6. That is right, I will maintain backward compatibility with WordPress 2.5 for the next update as WordPress 2.6 is just a minor release.
When WordPress 2.7 comes out in November 2008, I will bump all the versions to 1.40 and 2.40 respectively and I will remove the backward compatibility feature to WordPress 2.5.