http://jline.sourceforge.net/ Can provide cross-platform command history and other features.
This bug was previously known as http://jira.rhq-project.org/browse/RHQ-2085
Jline is in. So the agent now supports up arrow to get the previous commands. Also, when doing password inputs you should see stars instead of blank echos.
QA Verified - this seems to work nicely. Very useful!
Mass-closure of verified bugs against JON.