Hello,
For anyone interested, I have just released a very simple PNG loading library, you can use for LWJGL textures.
https://github.com/Mike-C/lwjPNGIt currently supports only 24&32 bit PNG, interlaced or not, and also scale, if you need texture sizes to be power of two.
Actually there is some extra overhead for scaling, which also uses more memory, but I wonted to keep the release simple, interlace mode compatible.
And whole image file is read during initialization, not only the image info chunk, that possibly will be fixed later.
Hope that you can find it useful!
Best regards,