Latencytop 0.5 has been released for a while and built in koji. Apparently it comes with a few improvements and a nice gui. It would be nice to have it pushed to F11 proper. But if it's not appropriate for F11 (e.g. needs kernel changes, or needs packaging work to split the gui away or some other reason) that's fine too.
latencytop-0.5-1.fc11 has been submitted as an update for Fedora 11. http://admin.fedoraproject.org/updates/latencytop-0.5-1.fc11
latencytop-0.5-1.fc11 has been pushed to the Fedora 11 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with su -c 'yum --enablerepo=updates-testing update latencytop'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F11/FEDORA-2009-9466
latencytop-0.5-1.fc11 has been pushed to the Fedora 11 stable repository. If problems still persist, please make note of it in this bug report.