I had this issue twice now, so here's for anyone else who may have it.
(Ubuntu 9.10 / CXG 8.1.4)
Issue: WoW installs fine, CXG adds launcher to desktop but launcher does not actually load the game.
Fix:
- Might as well just remove the pretty little WoW launcher, and start a new.
- Go to Applications -> Crossover Games -> Run a Windows Command.
- Browse to "Program Files\World of Warcraft\Wow.exe" and hit open.
- At this point, you can chose to Run it to test it first, or click Create Shortcut to put a Wine launcher on your desktop for it.
Let me know if this doesn't work for you as our configurations may be different!