"I don't know if WO has gone back to ObjC, as Apple seems to have given up on the Cocoa-ObjC bridge".
The answer to your first supposition, is no, WebObjects is 100% Java now. Apple is moving the WebObjects group towards making it more of an enterprise environment with huge increases in speed and load capabilities. On the other side they are giving up on getting Xcode to work with WebObjects and is pushing the developers to switch to Eclipse. There is an open group working to get the frameworks working with Eclipse.
Your second statment about the Cocoa-ObjC bridge is absolulely correct. Again it is a result of the new focus of the WebObjects group.
WebObjects is the dog food of Apple's web presence. Both the iTunes and Apple web sites are mostly programmed in WebObjects. AAA also uses a ton of WebObjects.
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