Dual input op-amps: is there any "crosstalk" between the two circuits?

Aaron,

There will always be some degree of crosstalk between channels on dual (or triple, quad, etc) op amp packages.  Whether it's significant or not is the question; many amplifiers specify "Crosstalk" as the metric for seperation.  This particular part specifies crosstalk as "channel seperation."  The datasheet shows 142dB at f=1kHz and Rl=1k Ohm.  There's also a chart on page 6 labeled "Channel Seperation vs. Frequency" that shows the crosstalk performance over a wider frequency range.