Longman Pronunciation Dictionary 2008 Lingvo 12

Contains over 225.000 transcriptions (British and American versions of all words)
Each word is voiced by British and American speakers (more than 150,000 audio files)
Completely renovated in 2008, and now contains words such as "iTunes", "Skype" and "Tikrit".
260 images with the results of a survey of native speakers.