The magnetic fields from those items don't produce much force, so you need a small thing on sensitive skin to notice the effect. A bracelet is probably too heavy to notice fields that don't also come with a "warning: strong magnetic field" sign.
I mean I guess I was thinking of something to amplify the effect, probably with a small battery in it. All the sated curiosity with none of the questionable body modification :-P
Sadly, you can't beat the physics with today's magnets. Magnetic monopoles are still sci-fi, so the strength of a magnetic field over distance falls of with an inverse cube law; the field strength is proportional to 1 / (distance ^ 3).
For the same reason, electromagnets need to use an enormous amount of power to be effective over long distances.
That's why people get these magnets implanted; because they sit right against the nerve, and the distance is on the order of nanometers. Hurts like heck to get it in, though.
How about a ring with magnetic material in it? I can easily pick up very small vibrations and movements in my wedding ring. I can imagine that a magnet in another ring would respond in a similar way, and felt much in the same was as a magnet in the finger.
From other comments in this thread I think facts of the matter is that the vibrations you sense in your ring aren't that small comparing with what you can feel with your fingertips.
Which to me makes sense, I wouldn't put the sensitivity at the base of my finger above what I have at the tip.
Powerful neodymium magnet rings are readily available and widely used by close-up magicians (search "PK ring" or "kinetic ring"). They don't palpably react to common electromagnetic fields.
