I was trying to install the weblogic portal on leopard mac osx , i was able to start server and create the portal domains , but had no luck on the weblogic workshop IDE. So i thought of ubuntu and did the following to install.
1. I downloaded the portal1001_linux32.bin from the bea downloads the HPUX version
2. mkdir bea_portal
3.cp portal1001_linux32.bin to bea_portal
4.cd into bea_portal
5.chmod +x portal1001_linux32.bin
6.run ./portal1001_linux32.bin
5.cat AUTORUN.inf
6.run anyone of the cmd line eg for gui
java -mx256 -cp installer.jar com.bea.plateng.wizard.WizardController mode=gui
7.Installer will guide your from there on.

Workshop can be launched from /home/mani/bea_portal/workshop_10.0/workshop4WP

Trust me its lightning fast on macbook pro and ubuntu.