According to this GCN article, Sun are thinking about implementing Type Enforcement (TE) in Solaris and Java:

Sun executives are considering adding type enforcement, a more granular approach used in SELinux, to their OS, but Vass added that his company is also considering adding it to its Java language because it sees merit in both.

TE is a fundamental SELinux component, and I really hope Sun incorporate it into their OS. I for one will be more than happy to collaborate to ensure interoperability with SELinux.