MailMessager v0.0.1 for KDE3 has been released. The utility integrates into KDE3 system tray via the systray4j API. Tested on Kubuntu 6.06 (dapper) with:
systray4j 2.4.1;
Qt 3.3.6;
KDE 3.5.2;
JDK: 1.5.0_09;
MailMessager and systray4j source included in gz bundle. Enjoy!