I really want to do a better job in the new church, but in the current setup what they do is put a single dynamic microphone poking in the end way up at the top (kind of wedged in there way up at the top).
One question overlooked in micing a piano is how much do they raise the lid? If they raise it high then you have room to position a boom microphone stand wherever you choose and use a large microphone. If they, like my church, usually only open the lid a little or not at all then you don't have a lot of space and need to be looking at attaching something to the bottom of the lid, usually a boundary microphone (aka a PZM).
The second is which part of the piano sound do you want to emphasize, the sound of the wires being struck (hammer sound) or the sound of the wires vibrating afterwards. To pick up more hammer sound you place the mic right over the hammers (duh!).
Contrary to much advicem you do not necessarily need multiple mics to record a piano, but if you don't you will need some significant eq. Obviously the strings directly underneath where the microphone is placed are recorded louder (again duh!). So if you put one microphone over the middle strings of the piano you will need to cut the mids and boost the treble and bass frequencies. With two microphones you put one over the lows, one over the highs, and let them both get some of the mids and between the both are covered. The goal of a 'stereo recording' of a piano isn't go get left and right tracks for the mix but to get high and low tracks which you then pan the same to place the piano in the final mix.
And tha's all I have to say about that.