This plugin stops access to your signup page, except where the visitor has been invited and clicked the link in their invitation email. Your users invite people, and you can see who has sent the most invitations, and how many resulting signups have occurred. Other features:

Today we have an awesome news theme, originally designed by DemusDesign, which I then ported to WordPress. This theme requires at least WordPress 2.8 to function properly, and includes some standard features such as threaded comments and comment pagination. There are also over 10 widget-ready areas, including a widgetized footer, plus a custom widget for ad management.

To configure a Mac OS X user account so that .DS_Store files are not created when interacting with a remote file server using the Finder, follow the steps below.