Most of you probably know the text-to-speech synthesizer of google translate, as you can access programmatically here btw:
http://translate.google.com/translate_tts?tl=en&q=text
My impression was it's sometimes using espeak, but in the major languages, the quality is much better than that. Anybody knows what Google is using, or what voices they are using? Clearly it's not the normal and also not the mbrola espeak voices.
I would look in the list of Google acquisitions
(Wikipedia, list of google acquisitions):
84 December 3, 2010 Phonetic Arts Speech synthesis UK Google Voice, Google Translate [90]