I think the CIFS Publisher plugin provides the feature you're looking for.
This plugin uploads build artifacts to repository sites using CIFS (SMB) protocol. First you should define CIFS shares in the Hudson global configuration page. After that you can refer to the shares using a select list in your project configuration.
Update Sorry, I just noticed that CIFS Publisher is deprecated in favor of the Publish over CIFS plugin, which is part of a common collection of publisher plugins for different protocols. In any case, the 'copy to remote CIFS share' feature is supported.