I did get that(JOGL) to work, although the tooltips appeared behind the 4 panes.
Yes, I've heared about that before (even without JOGL). I've even added a switch that forces JOGL to use only lightweight components (as swing does), but unfortunately this does (in this version of JOGL) disable all hardware acceleration, so it's even slower than JPatch's builtin software renderer.
I don't know how to fix it though - looks like a Bug in Swing on Apple's JRE - There's an option for Swing to render ToolTips and Popup-Menues as heavyweight components - seems to work fine on Linux and Windows, but not on the Mac

I'll try to google to see if I find some hints...
Apple supports Java3D
I did some tests with Java3D, but it's a high level scene graph API, and for JPatch I need low level access to the 3D card (as provided by OpenGL).
If you can get it run with 1.4, that would be killer.
Older versions did, but the new features of Java 5.0 are just too important to be ignored, so I switched to 5.0 a few weeks ago.
Is there any reason for not using Java 5.0?
I'll test that retroweaver though - If it works, it can modify classes compiled with 5.0 to be compatible with 1.4...