As far as the mobile template, it would be great if we could utilize a responsive design, making a separate mobile theme unnecessary. I’ll add this to our list of things to look into.
I’m not aware of anyone who has done this yet, though since the non-mobile templates are fairly close to the regular search templates, it shouldn’t be too hard to adapt the mobile search screens in a similar way.
I plan to make the website search results an official part of VuFind 2 sometime after the search system refactoring is done. At that point, I will definitely make it mobile-capable… though of course that won’t help you too much if you’re still on 1.x.
If you want to try to do the adaptation yourself, I’ll be happy to answer any questions you run into… and if you come up with a working solution, it can be posted on JIRA for others.