As lots of the same queries re the data breach are reappearing we've made an FAQs page Do let us know if there's anything important we've left off. We'll keep updating this document as soon as we have further any further info. Thanks.
EDITED BY MNHQ AT 17.15 ON FEBRUARY 8: We're now as sure as we can be that the total number of accounts affected by this breach was 46. We will be contacting these users within the next hour or so.