That would be even better than what I was hoping for! 
Would this service include tutorials/eBooks or only printed books? I think it would make sense to have both. Most people who want to get their feet wet with game development in Java as their hobby won’t invest in books right from the start. And i’m quite sure that these people are the majority of our community. Besides, it would be good opportunity for authors to publish their tutorials.
But I don’t want to miss books either of course. I simply couldn’t contribute anything. I’m a Receding Brow Worm, not a bookworm 
Once the platform would be installed I would help to gather some resources. Maybe we could start with something very small that would not hurt to throw away if it turns out that nobody uses it.
Maybe I would also be interesting to include non-English stuff in the future (hypothetical speaking). I know that there are quite a lot of German tutorials on the web. What do you think?
PS: this post made me a Jr. member! Yey!