I've created a tool for logging stack traces. The tool can be used with microlog to log proper stack traces in exception situations also when running MIDlets on real devices.
It's still alpha so there might be some rough edges, but it has been used in several JME projects already and it can be a huge time saver when debugging on real devices.
Please check it out at http://jarrut.sourceforge.net.
Great news! Many people have asked about this functionality. Thanks to the limitations of CLDC/MIDP, this is not possible to do within Microlog itself. Using a solution like this is nice.
BTW I will put up a link to jarrut from the Microlog main page.