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Taking Amit’s idea to the next level, here’s how you can make a mobile version of your blog.

Create a folder named m in your blog root—if you have a self-hosted blog. Dump a file named index.php with the following content in it:

1. <?php
2. header('HTTP/1.1 301 Moved Permanently');
3. header( 'Location: http://www.google.com/reader/m/view/feed/http://ckunte.com/feed/atom' ) ;
4. ?>
5.  
6. Download this example: /inputfiles/m.txt

Be sure to replace my site’s feed address with yours in the code above. Your mobile blog version would now be accessible at this address, for example: yoursite.com/m (or yoursite.com/blog/m depending upon where you created the m subfolder on your host).

I am averse to creating a sudomain just for this, but if you still prefer a subdomain like address, here’s a plugin code I just whipped up.¹

1. <?php
2. /*
3. Plugin Name: Mobile version via Google Reader
4. Plugin URI: http://ckunte.com/
5. Description: m. subdomain address is redirected to google's mobile version.
6. Author: Chetan Kunte
7. Version: 1.0
8. Author URI: http://ckunte.com/wordpress
9. */
10.  
11. if ( !strstr( $_SERVER['HTTP_HOST'], 'm.' ) )
12. return;
13.  
14. header('HTTP/1.1 301 Moved Permanently');
15. header('Location: http://www.google.com/reader/m/view/feed/http://' . trailingslashit(substr($_SERVER['HTTP_HOST'], 2)) . 'feed/atom');
16. exit();
17.  
18. ?>
19.  
20. Download this example: /inputfiles/moplug.txt

Download the file above², and rename it to, say, moplug.php and upload it to wp-content/plugins folder. Your mobile site would now be accessible at m.mysite.com—all this without having to create a subdomain.

1. Do note that I haven’t been able to test this on my host, since I have a subdomain related problem at the moment, but I believe this code would work. [←]
2. Make sure there are no empty spaces after ?> in both the code snippets [←]