Some years ago, Deutche Gramaphon(sp??) issued a series of Folk Music From WXYZ records, and I was able to pick up songs of Italy, Austria, and Germany. I have no idea if these were even moved onto CDs but they seemed to include a representative sampling from around the country being featured.

IIRC some of the songs on the German record included Mus I Denn, Swabish Isenbahn, The Reeperbahn, Where the North Sea Rolls - this one correct enough to bring tears to the eyes of a German man from the north west of Germany, when I was whistling it idly one day at Wiesbaden AB, in south central Germany - a landler, a Schuplatler, etc.. All in all a great sampler, and one I'd really like to see on a CD.

Dave