Steve from JPL has provided a comparison of various web frameworks as a video. Quite nice, even if he of course simplifies some things quite a bit. Warning: the video is very large (300 MB) and J2EE comes off badly.
Regarding the Django comments (after all, I am a Django contributor): I18N has been in the standard for a long time, but since Django moves very quickly, you can't expect it to take everything into account. And with the templates, he is not dependent on the Django template language, he can also use ZPT (the same ones as in Plone).
But the central point comes across well: forget J2EE, learn something else. And in this case, the decision between Plone, Rails, TurboGears, or Django is probably completely irrelevant - the main thing is that you learn something that you also enjoy programming with.