Profit of mining Bitcoin vs Namecoin

[wizzard0]

I've made a bitcoin profitability chart - http://tvori.info/bitcoin/charts/,
which uses Namecoin Exchange tickers to display whether it's better to mine NMC or BTC currently.

Suggestions welcome. Also, searching for historical NMC/BTC ticker data (and too lazy to pull historical difficulty data from my namecoind)

[Clockmaker]

i put all my BTC into NMC, then I pre-ordered http://ro.bit