For those who work on their own websites or blogs, Google have released a tool to aid in getting your site to behave as multilingual. I can see why they think it would be useful, but there are already an incredible number of ways to use Google's Translation service anyway. If someone who speaks a different language to what your blog is in finds it via their search page then they get a Translate option, if they've got the Google Toolbar installed you've got a translate option, and let's not forget that you can actually go to their translation page and paste in text or a URL.
The advantage that this gadget has is that if a user finds your site through a means other than a Google search that they can then translate your site at the click of a button even if they don't have the toolbar installed - that is actually quite useful in reaching out to people who speak other languages as not everyone uses Google.
I think personally I wouldn't copy and paste their code verbatim - I'd take the two script tags and put them at the end of the page out the way rather than having bits of JavaScript floating around the mark-up of my site (I'd probably consider putting it in a load event inside an external file too actually).
