I ended up using JMUnit for my mobile java project. The Sony Ericsson jUnit tool is great when you have to run the tests from a PC on a real device or from a “real” jUnit application. It’s a more advanced tool, but for my needs at the moment, it’s a bit overkill.
So I ended up with what can only be described as the direct opposite: JMUnit is extremey simple. If I change my mind in the future, converting the test cases to jUnit shouldn’t be too difficult.