I have been reposting several posts from my weblog here. As my blog is in Dutch, this might have been of limited use for most readers.
Recently I was able to put a dynamic auto-translation link on my weblog. If you click the flag it automatically translates the page from Dutch into English. This works on any individual page of my blog.

You can easily change the language codes to apply the same to other languages.

See it here: http://www.rijneveld.eu/2007/11/read-my-blog-in-english.html (english here)
code here: http://www.rijneveld.eu/2007/11/de-code-van-het-vlaggetje.html (English here)
Wouter