hard shit - Spiderbait "Black Betty" (haven't heard the whole album but this remake rocks!)

funk/soul/lots of instruments (artist: album) - Incognito: Adventures in Black Sunshine, Galactic: Late for the Future, Karl Denson's Tiny Universe: The Bridge

sweet female vocalists - Beth Orton: Daybreaker, Tori Amos: any album (not obscure but profoundly talented...one of my all time favorites)

bluegrass - saw Old Crow Medicine Show (mentioned above) live in Nashville....WOW

drum & bass (sampled shit) - Kruder & Dorfmeister (any album)

chilled-out sampled albums: DJ Mark Farina Mushroom Jazz series (Vol 1-5); Cam del Mar Ibiza Sunset (one of my all-time most-listened-to albums)

Electronica/classical/Norwegian - Royksopp

Good luck!

p.s. love the site.