The Fork and Bottle page I've linked to has heaps of useful information and links &c., and I simply haven't time to give you my dilettanteish overview of biodynamics anyway. Please comment below, though, if you've questions you'd like me to answer.
The principal Bubble Brothers biodynamic suppliers are Montirius, Meyer, Champagne Fleury and Château Romanin. All French, you'll notice. If I've left anyone out, please remind me and I'll amend this list.