Just noticed that Google has added Simplified Chinese <> English translation to its Language Tools.
These translations are terrible though. Good for word-for-word, but not for phrases and sentences.
This kind of translation can be good for navigating site though. I got a Firefox modification. Now I just click a button and it translates a Chinese page to English. This can be useful for some big site with lots of links, like Yahoo Taiwan.
Their Klingon interface is useful enough, but they still haven’t added it to their list of languages that they’ll translate to.