Yeah, I seriously doubt we'll be seeing Java make a big splash in the Mac Store. It's not that the UI is inherently bad, but rather that the "Mac experience" demands something tailored to that platform, which defeats the purpose of Jave in the first place. Java is great in that an app will run the same on WinXP or Win7 or MacOSX or Ubuntu. Unfortunately, Apple doesn't want an app that looks and runs the same on OSX as it does on WinXP. I wouldn't be surprised to see them bring in Objective C as the Mac Standard, and treat most other development ecosystems as second-class citizens.