Running strings on the jaid library, I can see the following jad attributes:

MIDlet-Name
MIDlet-Vendor
MIDlet-Version
MIDlet-Jar-URL
DRM-File-Size
Oma-Drm-Package-Size
MIDlet-Jar-Size
MicroEdition-Profile
MicroEdition-Configuration
MIDlet-Description
MIDlet-Icon
MIDlet-Info-URL
MIDlet-Data-Size
MIDlet-Permissions
MIDlet-Permissions-Opt
MIDlet-Install-Notify
MIDlet-Delete-Notify
MIDlet-Delete-Confirm
MIDlet-Jar-RSA-SHA1
Mot-Jar-DRMMode
Mot-Program-Space-Requirement
Mot-Data-Space-Requirement
Mot-JavaVM-Heapsize
Mot-NEXT_URL
Mot-Data-Network
Mot-AutoLaunch
MIDlet-%d
MIDlet-Push-%d
MIDlet-Certificate-%d-%d

Anyone know what Mot-NEXT_URL and Mot-AutoLaunch do? The latter seems obvious, and if I set it to True it gets copied to the midlet's registry.txt, but doesn't seem to do anything.