Sourdough Starters

I'm inspired (and a little drunk, but mostly inspired). Having watched the venerable Hugh Fearnley-Whittingstall's River Cottage show, I've decided I might keep some sourdough starter. How awesome would it be to make fresh bread whenever you need it? And apparently, when you get it going, you only need to feed it once a week. I've been banned from keeping fish; I think I'll keep yeast instead. It seems to be remarkably simple- I'll be following Mr. Ross' instructions. They seem to be kosher. I'll keep you posted (literally).