There is yet another new build (20120227) online at:

http://davy.preuveneers.be/phoneme/public/maemo/deb/

With this build, you should be able to select a jar or jad in the File
manager, and phoneME should automatically open it (rather than going
through the 'Run MIDlet' application). It took me a while to figure out
how filenames were passed along through dbus and how to set up a
service to handle the JAR/JAD file types. I also added two icons to
better distinguish the JAR and JAD files.

However, I am not sure if this works on the N9. It is quite likely that the
service, mimetype and icon files should be put in a different folder
(compared to Maemo).

Could N9 owners please check whether they can find other xml mime
package descriptions in /usr/share/mime/packages/ and service
descriptions in /usr/share/dbus-1/services/

Thanks
Davy