Taking a lunch break in my drive to the South Land ... Ah the joy of 3G service and an iPad! Die Gelbe Gefahr is a fantastic cruise missile: set it to 75 mph, have some nice music on the iPhone, keep the environment cool and comfy, and it just soaks up miles. Fuel consumption is nicely reduced from my day to day in town driving too. :-)
Got the Leica on the floor next to me, but haven't been inspired to stop and make any photographs yet. I did snap a couple with the iPhone.
But I digress.
Lightroom's default sharpening (and all other parameter) settings are configurable. I don't get any sharpening induced stair stepping with my AA-less cameras (E-5, M9, GXR-M) because I configured the defaults to eliminate all input sharpening as a starting point with these cameras.
The Fuji sensor presents different difficulties. To me, based on the info that Sandy has posted, I'm very unsure whether their fancy sensor has any real advantage over the long term.
I do think there's a small market for specialized, higher quality raw conversion apps still, like RPP, but Lightroom is really darn good and takes the lion's share of the market now. Aperture is somewhat behind the bleeding edge and even I don't have any idea what the plan for its future might be. One thing I do know for sure is that I don't get along with its user interface design at all—I greatly prefer Lightroom's layout, tool design, and workflow. It just makes more sense to me.
The one thing NOT to do, Sandy, if you do think about producing an OS X version of PhotoRAW is to not do what Nik did. Snapseed is brought as close to the entire iOS UI design directly into OS X and, frankly, it just doesn't work very well at all. On iOS it's brilliant, on OS X I can barely get it to work.
Far as I understand it, Adobe only automatically applies lens corrections for cameras that the manufacturers' intent is to design the lens correction into the raw conversion as part of the lens design, like the Micro-FourThirds spec defines. Lens corrections are supplied in files for specific lenses and switched on and off by user for camera systems which do not include this type of design, such as Pentax, Nikon, Olympus, and Canon DSLRs. They also provide tools for these systems so that you can evaluate and install your own lens correction files.
I don't know what Fuji or Sony do with their systems, but if the raw data contains lens correction information provided by the manufacturer, then Adobe will likely apply those corrections automatically. This has nothing to do with default input sharpening settings.