is there anyway to have the viualization be in the right part of the ejukebox ? have it cover the songlist or album list but leave the left part accesible?

This should be possible by configuring the proper visualisation in winamp, shouldn't it? I haven't messed alot around with it, but if you position the window correctly, and the plugin has the possibility to remember its position, then it should appear in the same place each time.

However, it would be movable and would also dissappear when you click in eJukebox unless you use patches that keep specific windows locked and "always on top", One such tool is "Actual Windows Manager". It cannot keep windows immovable, but can make sure they always stay on top, and you can also make the windows transparent.