It doesn't look to be possible to buy XRP with btc through ripple , as ripple cannot be funded with btc.
Could be missing something or the point of ripple entirely.
Yep, you missed it. Open a Bitstamp account, fund it with Bitcoins then "Withdraw" the BTC to your Ripple account and use the Bitstamp BTC IOUs to bid on XRPs in the order book.
Okay but how do you do the reverse? IE: fund with Ripples and withdraw to BTC?