I've been digging around looking at different things to try and make this work, no luck so far but I did open the Notes exe inside the package and got this from Terminal:
Last login: Mon Jul 13 08:40:51 on console
USA-MAC:~ godsmack$ /Applications/IBM\ Notes.app/Contents/MacOS/Notes ; exit;
IBM Notes:
A Java Runtime Environment (JRE) or Java Development Kit (JDK)
must be available in order to run IBM Notes. No Java virtual machine
was found after searching the following locations:
/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Commands/java
logout
Saving session...completed.
Deleting expired sessions...none found.
[Process completed]
So it appears to be a Java issue? On my iMac it gets to the opening screen and then just wont open.