There is such a thing as pure structural expression, selection and combination. In fact the old formalists and structuralists pretty well analyzed metaphorical expression as figurative juxtaposition of elements, though that's taking things to a lower, internal level -- yet it can also apply to the selection of other whole works. Magazines have done this, though rarely in very creative ways. Anyway, one creates one's own venue and curates perfectly well -- even without bloggish commentary added. Emphasizing that one does the "value add" of blogging discursively *about* items selected distracts from recognizing what curation is in essence. It's just picking things and combining them -- the principle of selection is often unstated, though one could define one's venue to help facilitate people's entry.