If you want the latest Eclipse 3.5 or 3.6 do not install from the repository using yast, it can not be upgraded.
Install Eclipse classic from the eclipse download site and then look at the other packages to install their components.
The Eclipse 3.4 install on Open Suse 11.3 is broken so that the update sites list is empty. To fix it do the following:
Start Eclipse, and go to Help → Software Updates and then select the Available Software tab and finally Add Site. Add the following site: