I'm running on Windows 7 right now for kicking the tires, as it were. I had to do a couple small changes to get it going, so I am sharing them below:

1. Writable directories and files

On the WordPress Installation Guide for CiviCRM 4.1, you'll see the error mentioned "The user account used by your web-server needs to be granted write access to the following directory..." and a link to the CiviCRM forums. The suggested fix to change the read-only flag on the directories and files did not work for me, using the GUI or command line on Windows 7 (as administrator or not as administrator).

The workaround that allowed me to continue was to comment out the checking for writable directories in the /plugins/civicrm/civicrm/install/index.php lines 368 to 370:

        foreach ( $writableDirectories as $dir ) {
            /*$this->requireWriteable( CIVICRM_DIRECTORY_SEPARATOR . $dir,
                array("File permissions", "Is the $dir folder writeable?", null ),
                true );*/
        }

2. Fix an HTTP Error 500 Internal Server Error

I clicked the CiviCRM install button and everything seemed to be running. But, clicking "CiviCRM" on the sidebar, I got an HTTP 500 error. Uh oh. Nothing specific was mentioned in the web server logs as to why. After some trial and error, I fixed it by editing the civicrm.settings.php file. $civicrm_root and CIVICRM_TEMPLATE_COMPILEDIR variables. They had a mixture of forward slashes, backslashes and double backslashes in the paths. Once I changed them all to single forward slashes, I could reach CiviCRM. My example below:

global $civicrm_root;

$civicrm_root = 'D:/www/wordpress/public_html/wp-content/plugins/civicrm/civicrm/';
define( 'CIVICRM_TEMPLATE_COMPILEDIR',
'D:/www/wordpress/public_html/wp-content/plugins/files/civicrm/templates_c/' );

Update January 16, 2012: Thanks to those who attended the presentation at Wordcamp. I have uploaded a revised set of presentation slides in PDF format that includes screen captures of the demonstration portions. If anyone has more questions, please leave comments on this post and I will try and answer them. blog-search-using-solr (PDF; 1.8 MB)

Update January 2012:  I am pleased to be presenting "Blog Search Using Solr" at Wordcamp Victoria 2012. As of today there may still be tickets available, so hurry and get yours now if you haven't already. See you there!

Original topic description: If you discover the default search in WordPress is too basic, you may benefit from installing a Solr for WordPress plugin. Enabling the power of the Lucene searching engine implemented in the Solr server sounds daunting, even to me. The search technology used by Digg, Netflix and Acquia (and others: http://wiki.apache.org/solr/PublicServers) could be yours. As a result of using it, you will discover whether the advantages outweigh the disadvantages. Features like faceted search, keyword highlighting, and more are just the start. Once you see the plugin in action, you will understand the untapped search potential it provides.

You will find this blog using Solr for WordPress right now, and it is still a work in progress (so hopefully it still works when you try it).