How to create a subdomain for mobile? Details inside:

Hi,

I have a site, I’d like to create a subdomain of it for mobile presentation.

1 – Both websites will show the same posts and custom posts. (shared database)
2 – Each website will have different pages that will display those posts differently.

Because of #2, I can’t just use a theme switcher, I really need to design an entirely new website from the ground up for mobile, but using a shared database.

HOW CAN I ACHIEVE THIS?

This seems to me such a basic question, but I can’t find answers anywhere. All I get referenced to is Multisite (I’m not trying to create a network)and WP-Touch (might be useful, but I need more than just switching a theme).

Anyone know the steps needed? Any tutorials I’ve not found in my days of scouring the web for answers? As a side note, I’ve developed the main site with heavy usage of Toolets “Types & Views” and it’s awesome. I have an incredibly complex main website. My goal is to create a very customized, stripped down version of that site for mobile.

OTHER THOUGHTS:
I don’t need to map page-for-page, since the pages on each site will be very different. I’ll look to auto-detect for mobile and also allow switching between, but each time it can land on the requisite home pages. I just need:

1 – How to connect 2 domains to 1 database.
2 – a good recommendation on a switcher plugin for this scenario.

THANKS IN ADVANCE!