>Are we talking about lenses, cameras or both? Does sharpening >in the camera do the same as sharpening in post processing?
In-camera sharpening (as applied to JPEGs) does the same job as sharpening in post processing. Any digitally-captured image will need some sharpening - that's just the way the technology is implemented currently. Allowing the camera to do it for you is certainly simple, but be aware that once applied, it can't really be "un-done" - and it's unlikely that every type of subject will require the same level of sharpening.
Leaving the sharpening to the post-processing stage is a more flexible - though more labour-intensive - option.