Kindlefish has been offline due to Google moving Google Translate to a pay-for-service model and a change in the way developers access the translation services at Google.
I've decided to put Kindlefish back up on an experimental and donation basis, which include a major rework of the interface and the code. All of the code has been rewritten from the ground up.
Right now, the website is available as a beta of version 3. All features currently implemented is working on the Kindle Keyboard 3G, but if you are a K2/DX user, please send me your feedback at nicholas.open [a.t] gmail.com as I don't have access to either of these for testing.fs
...And please consider donating to keep Google paid and Kindlefish running.