nmatrix9,
The ICEfaces integration is a realtively new addition to MyEclipse and works just fine on Linux.
Just to clarify, the ICEfaces integration has been done for the Visual JSF Designer that was added in MyEclipse 5.5 and works fine on Linux. This is separate from the Visual JSP Designer which is older and integrated with the Visual HTML Designer.
JSF, Facelets and ICEfaces page designing are all part of the new Visual JSF Designer. If you right click on your Facelets or JSF pages, under Open With you should have 2 visual designer choices, the correct one should have been set by default, but if you have tried out different defaults that might be why it’s not working.
Example: