Let me start off by saying that I love this plugin. Thank you for developing it!
The only thing I could think of that is keeping me from using it in a real-world situation is the inability to choose different mobile themes for each domain. I don't know exactly the best way to go about adding this feature to the plugin, but perhaps it could communicate with an existing mobile theme switching plugin to allow the user to pick a default theme and a mobile theme per domain.
If there is already a solution to this problem, then please forgive my ignorance and let me know how it's done. Thanks!