Web Echo allows you to publish your iWeb site ( or any other of your Web pages ) to your Web server. It only updates those files that have changed. Web Echo is aware of Web Echo and will automatically configure itself to handle uploading of iWeb sites without a .mac account.
The program can also generate HTML files for you based on what is present in your local folder. Say you have a folder full of pictures you need to share with the world. No problem, point Web echo at that folder. Web Echo will upload your pictures and generate HTML files so that your visitors can browse your site.