The shortcut doesn't work (cannot be run from hildon desktop):

/opt/phoneme/bin/runmidlet /opt/phoneme/Nimbuzz.jar

changed to (makes it work):

run-standalone.sh /opt/phoneme/bin/runmidlet /opt/phoneme/Nimbuzz.jar

Navigation is truly done with the arrow keys, and enter selects, but i'm stuck at the login screen - pressing sign in (or exit) does not do anything.

I also think adding description at first thread is important

This application is similar to skypeout which allows making calls to international numbers (both land an cellular) with very cheap prices. unlike skypeout, it does not charge for connection fees which makes skypeout too expensive to my opinion for such a service.

This is a very essential application for travelling people. you can see their exchange rates at: http://www.nimbuzzout.com/en/nimbuzzout/rates