SuSE 7.2 comes with java 1.1.8. This version is obsolete, but it is the last JDK that can be redistributed by third parties.
You have two alternatives: install IBM's JDK 1.3.0 which is included in the SuSE distribution, or download Sun's JDK 1.3.1 or higher. I have installed 1.4.0beta2 and it works.
After installing a new JDK, become root and re-link '/usr/lib/java' to where your JDK has been installed.
Example:
mv /usr/lib/java /usr/lib/java1.1.8
ln -s /opt/j2sdk1.4.0 /usr/lib/java
Now you got rid of all 1.1.8 stuff. Also you could have removed the 1.1.8 with Yast2.
Then type 'java -version' and voila. Now you can download LimeWire, and install.

Cheers, Jörg