Thank you for asking this! I've been meaning to ask a similar question for a while. Especially at this time of year, when wet hands means hold hands more than anything else. As winter sets in, I already have decent options for keeping my hands warm, but it's been a pain to find something that I can wear over them to keep my hands dry.
I was still at the early stage of looking around, and was disappointed by the expensive ($100-200) glove/mitt "systems" around. I just want a rain shell for my hands, durn it!
I'd never seen the MLD eVent mits- going to put them on my Christmas list! At least, if I can weight that long... :)