I just realized that RSS-feeds don’t seem to work with lay theme. I guess it has to do with the architecture of the theme (how and where the posts get to be saved etc.).
Will there be a feature for that in the future? I use feeds on a daily basis and would love to have working RSS.
A simple Version with an extra Field per project / page below the gridder would be more than sufficient. Just copy-paste an excerpt and a few images, et voila!