Wanted/idea: responsive images plugin

[blazejs]

I have tried Adaptive Images some time ago but this wasn't something I was looking for. I think it works quite good for big images. But imagine - I have a content container that is e.g. 600 px width for desktop version. And I can't figure out what picture someone can insert there. That might be 600 px width but might be 450 px what would be too much for 320 px width screen (and even for 480 if we count margins). I was trying to downscale images with css but that also isn't working as I'd wish to (there must be added a class to image and someone could forget that). Problem is in inline images inside text that are usually also floated.
There's quite nice but not perfect solution in WordPress using build in thumbnails and is_mobile function.
I think I'll give a chance to that CKEditor plugin when I have some free time and I'll let you know.
Thank you anyway