I work for a company that uses IBM iSeries machines (aka as400) so i needed a tn5250 emulator. CentOS 5 comes with tn5250 but that package is very limited. I found tn5250j (java based) and i've tested it for several months ... now it's time to package it as a rpm instead of using their java jar installer ... Here it is : http://rpms.arrfab.net/centos/5/i386/repodata/repoview/tn5250j-0-0.6.0-1.el5.af.html .
You need the sun JRE 1.4 minimum (i use the 1.5 without any problems). This package doesn't work correctly with the provided java-1.4.2-gcj-compat !