UnixWare 7 developers report good success running the open source JBoss J2EE implementation. SCO is working on packaging it, to start with for their Smallfoot (embedded UnixWare) toolkit.

Some J2EE implementations have been certified for UnixWare 7 in the past, e.g. Novell Silverstream on UnixWare 7 with LKP.

Bear in mind that you don’t always need the whole enchilada! For just Java servlets and JSP, use the Tomcat package that comes with both SCO OpenServer 5.0.7 supp 3 and UnixWare 7.1.4. JDBC usually comes from your database vendor. Java-based SOAP/XML Web Services can be run using the Apache SCOx Components included with OpenServer 5.0.7 supp3 and UW 7.1.4.
jls@sco.com