I made a patch with some improvements:
- i18n of services' names
- filters for services' names in links
- missing textdomain from gettext function
- filter for exclusion of custom post types
Filters for names of services are added because of languages that use cases, where just translation of service's name is not enough.
For example, in Serbian we can have Подели ово: Фејсбук for Share this: Facebook, but we'll have Подели ово на: Фејсбуку for Share this on: Facebook.
Filter for post types is added because Sharedaddy uses is_single function so if posts are chosen as option, it adds sharing on all post types except pages.
Note that we still won't have post meta box for exclusion since post types are not supported well (it's wpcom centric plugin).
Please include updated POT file in next release.