After letting a locked-up Eclipse sit all night, I was finally able to click the install button for the Motorola SDK in the morning. However, after some time Eclipse returned with this error message:
An error occurred while installing the items
session context was:(profile=PlatformProfile, phase=org.eclipse.equinox.internal.provisional.p2.engine.phases.Install, operand=null --> [R]com.motorola.studio.javame.emulator.devices.linux.gtk.x86 3.0.0, action=org.eclipse.equinox.internal.p2.touchpoint.natives.actions.ChmodAction).
The action chmod failed - file /usr/lib/eclipse/JMESDK/bin/emulator does not exist
I don't know from where to get that emulator, and googling the error message turned up nothing. This is on Kubuntu 10.10 and Sun java.