Does anyone make a clamping spoke wrench? I'd like to find some sort of "spoke wrench" which actually clamps onto the nipple (not the spoke proper), so that nipples that are slightly rounded-over (or, like aluminum ones, have a propensity to round-over) can be adjusted without further damaging the nipple.
The Park SW-10 is exactly what you are looking for. It can really save the day. If possible, use it (and a healthy dose of light lubricant) the moment that you notice any stripping to completely remove and replace the damaged nipple. I've seen very old versions of identical design, and wouldn't be surprised to learn if it dated back to penny-farthing days.