What's to be done?
If one owns nail clippers, toe nail clippers and a nail file (for any sharp bits) and a decent eyebrow trimmer (like the one I described in my Eyebrow Trimmer thread) I can't see the point.
Women definitely notice eyebrows that could use some work, but most don't have any expectations about men's nails providing they are trimmed and clean.
But then again - maybe I've missed something. What would you envision?