As part of our developments for the E-Lane Project, we have just started to work in order to integrate all the CoP's packages (ratings, clipboard, related-items, ...) in dotLRN.
Have a look at the dotfolio packages, as I have spent some effort internationalising string and separating out queries into xql files. Mind you I haven't modified the clipboard packages, etc directly, only the code that integrates with these packages. It should give you a head start.