[development] relationships API vs i18n

[Moshe Weitzman]

> If we do use 'relationships' as the basis for translation, I hope we 
> take the time to do it in such a way that taxonomy terms, buddy lists, 
> and other kinds of connections can be represented as well.

"take the time"! we have been talking about this for about 5 years. in that 
time, i don't recall any core patch for this API.

even a simple nid => nid system would be very helpful. i'm not necessarily 
advocating that, but i submit that a decent implementation that exists is 
preferable over a great one that doesn't. in other words, i'll take almost 
anything thats simple.