Simple:Press is a feature rich forum plugin for WordPress. It fully integrates into your WP based site utilising the same user records and database and displaying on a single WP page. It is fully customisable and comes with a number of skins and sets of icons to get your started. Current users have shown it to be fully scaleable whether your site membership numbers the tens or the thousands.

Simple:Press Forum

This walkthrough will guide you through how to enable “Pretty Permalinks” for blog posts in the WordPress blog engine installed on IIS 7.0. Typically, without URL rewriting functionality on a Web server, WordPress users have to use “Almost Pretty” URLs (for example, http://contoso.com/index.php/yyyy/mm/dd/post-name/). This was the primary option for users who chose to host WordPress on IIS. Now, with the URL rewrite module available, you can have “Pretty Permalinks” (for example, http://example.com/year/month/day/post-name/) for WordPress blogs hosted on IIS 7.0.

Enabling Pretty Permalinks in WordPress : Using URL Rewrite Module : Installing and Configuring IIS 7.0 : The Official Microsoft IIS Site