Amit, it was nice to find a plugin claiming to produce a mobile sitemap, but it is very incomplete.
I use WordPress Mobile Pack to "mobilize" my site and I redirect mobile traffic from http://www.ronitbaras.com to m.ronitbaras.com. However, there is no way to tell the plugin to take a different site URL as a starting point.
Also, the lack of automatic regeneration means I have to recreate the sitemap after every post. There are enough examples of code to be copied.
I've love to use the plugin when it's more complete. Perhaps you can get it bundled with the mobile pack.