I bought a pair of Miche hubs last October. They came with 15mm tracknuts, but the axles are definately not stainless and have developed quite a bit of rust. I don't use the cog carrier so I cant comment on that. Generally I like them, they are smooth, good looking and seem pretty solid.
mcatano, why can't you get into the hubs to change bearings? Is it because the locknuts and/or cones are rusted tight? Does anyone have ideas about how to prevent this (other than not riding in the rain)?