Funambol is not for push email even though it's able to sync emails among Outlook and mobile devices. Its main usage is to sync PIM data (such as calendar, contacts, notes) between Desktop email client such as Outlook and smartphones. Anyway I tried installing it today without an issue but running it is a no-go. Reason: the build is based on i386 architecture and there's no source code that I can obtain so that I can re-compile on the plug.
sheeva:/opt/Funambol/tools/jre-1.5.0/jre/bin# file java
java: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.2.5, stripped