Crimson Research has just published a paper comparing total cost of ownership (TCO) of WebLogic versus JBoss.
You can download the paper here. Key point it makes is that acquisition of an application server platform is only a small part of the total cost of ownership over a 5 year period. What I found surprising was the speed with which the report suggests the lower TCO of WebLogic begins to be noticable, it indicates that the break even point is about 18 months into the deployment.
The study was sponsored by Oracle but Crimson conducted it using their own methodology and it certainly sets out a good case for the benefits of “-ility” features in bringing down the implementation costs of an applications server infrastructure. This gels with my own experience where the more I work with operations staff the more I learn how important things like script recording and WLST are to them.