I was discussing again with Ales the server/xxx/lib-opt directory we've added a while back, and it seems to me a lot more appropriate to put any conditionally enabled .jars together with the corresponding deployer.
With the proper classloading settings this lib, or other versions of it, should be conditionally put in the classpath by the seam deployer.
This makes the deployer more self-contained and removes the extra directory bloat.
As of r80658 I'm still seeing \server\default\lib-opt.
Dimitris' idea seems like a good one, this way deployers in the future, which sometimes need additional jar's, don't need to all throw stuff in \lib-opt. So how about making this change?