Dear Unregistered, I just want to bring the fact to your attention, that a packaged version of LimeWire for Linux does exist (although it's not an RPM but a simple tar-archive). You can find it at http://www.limewire.com/index.jsp/download_other

Simply unpack and run. (Oh and be sure, you got the JRE 1.3.1 installed)

As for packaged versions of software, you too will find out, that not any rpm will work on any system without some tweaking.