I came across a great article on JBI and CICS on TheServerSide.com written by our friends at Gruppo Imola.

Imola is a member of the Project Open ESB community and is developing several JBI components there including a CICS Binding Component which is the topic of the article they've written. But they've also worked on a CORBA Binding Component that is in a similar state of development to the CICS BC.