Perfect-ly in ti-me for Easter week-end: the Speech Accent Archive (via DevNull).
The site has 2 classic examples of Dutch people speaking English (Nijmegen and Amsterdam). Note that I doubt the claims of the Nijmeger speaker that he has an academic background. The Amsterdam speaker comes closer to the English the twin brother speaks. I mentioned this earlier (or slightly accent-related stuff) here, here and here.
Fascinating material. To hear people speak English, you need Quicktime, though. This Texan voice sounds to me like the most perfect English speaker. Seriously.