Drupal Site accessible to Mobile

I have some 20 sites with common codebase and database via Drupal Multisite installation. Whats the best way to make a multisite Drupal installation also accessible via mobile.

For example, I have sites like www.abc.com, www.cde.com, www.fgh.com etc all poiting to same codebase and a common database of a Drupal multisiste installation which uses Domain Access Module as its key module. Whats the best way to make a multisite Drupal installation also accessible via mobile. So now I would like www.abc.com when accessed via mobile to show the mobile version or get redirected to mobile.abc.com

1. Use Mobify.me and associate plugin
2. Use Drupal Mobile Plugin http://drupal.org/project/mobileplugin
3. Make a page in php using Drupa开发者_如何转开发l database.

The mobile version just needs to show the last 3 items while the web version is a complex magazine layout.

Whats the best solution considering the following points

1. flexibility
2. low server load
3. fast response time
4. reliability

Alternate solutions are also welcome

There is a good overview of options here

Option 1 and 3 are fails when it comes to most of your criteria.

Mobile Tools seems better supported and used than mobileplugin, but it is probably worth experimenting a bit to see what works best in your environemnt.