Remember that there is no local flavour of the old and useful - imho - OC4J Oracle Application Server Containsers for J2EE 10g in the new Forms 11g environment.
That could - and will present a problem to be solved- in the developer environment of the application life cycle management.
Further, the WebLogic Server needs a larger footprint that the old way of doing application development using the OC4J locally on your - typically - PC. Test and production environments is another more solvable issue, since they are mostly Linux based environments. But the development usually are done using the traditional PC with XP.
I have seen trouble installing the Forms 11g on a Vista PC so do not try that at home, it might not even be certified. Please consult the certification table at My Oracle Support for information on that issue.
There are means to lower the foot print for the local WLS Server that is needed if you want do perform basic tests on your PC environment. There are parameters to set, you will find them on google.
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