Not sure if its possible. But ... i know with Spring you can define a configuration properties file in the beans. And then you define names in there and inject into your components.
But you can allow it to override and use System properties instead.
Can that be done in Seam as well? I just have a few items i have to look up from the system propertites nad i just find the injection cleaner than hardcoding System.property?
GOod idea, please file an RFE in JIRA to allow you inject the system properties map.