Still useable with the latest CrossOver version (v6.0). Using Newsbin Pro 5.21 as I had problems with the lastest version - some of the gui stopped functioning. More details at the newsbin pro forum website in linux area.
Edit 31/10/07: Works okay with latest version of CrossOver linux 6.20 and Newsbin 5.35. Some issues still there. Known issues and tips & tricks updated.