Just wondering what people's preferred import sharpening settings are for the X1?
Your question is confusing. Do you mean what sharpening settings to apply as a default?
I've been playing with a couple of X1 files recently. Lightroom's standard sharpening default is amount:25, radius:1.0, detail:25, and masking:0. This seems to work just fine as a starting point for most photos.
(By comparison, the same defaults applied to the E-5 raw files seems slightly too much on average, so I backed off the amount to 15, set the radius to .7, and set masking to 75. I saved that setup as a part of my defaults for the E-5. For the E-1, I go the other way as a default and bump up the amount to 35 and set masking to 50, countering its stronger AA filter.)
Much of the decision here is a matter of taste, there isn't an absolute right or wrong. I'd suggest looking at a couple of dozen photographs to see what settings you find yourself using a lot, then set them as a default.