**broken link removed**
That circuit should do well as a buffer or a booster (and its very simple). The gain is Rf/Rin + 1. A small gain may be sufficient, but if you find you need more it would also be pretty easy to increase the gain by increasing Rf. I would recomment decoupling capacitors (10uF range would be decent) on the input and the output to block your biasing. Try something like Rf = Rin = 1k, with the resistor on the positive input = ~10k (its not very important... what ever you have handy). Should have a gain of 2ish, and the opamp has a huge input impedance and a very small output impedance.