[mods: feel free to remove if the self-promotion is inappropriate!]
I just put this out:
http://www.youtube.com/watch?v=NoMXEC4eVM8has a tack piano in there (left channel) ... it was a kind of bad-sounding console (? - little upright) that couldn't keep it's tune, so I covered the thing in 'vintage' (i.e. NOS slightly rusty old) tacks!
I love the sound and production of the track!
And always good to see early 70's Mike Love dancing.
ha! that's true huh?