One of the members at NetBuilders, a forum where many proxy webmasters convene, has revamped the once abandoned Suffix Proxy open source script. There have been many additions made:

• Maximum file size limit for downloads of single files.
• Prevention from Google indexing proxied pages to cut back on duplicate content issues.
• Ad slot on proxied pages for webmasters to monetize their sites.
• Centralized configuration file.
• Blocking URLs.
• Blocking keywords.
• IP Bans.

Check out the official Suffix Proxy site and test the beta version or download the latest stable version.

View the forum discussion thread here for more details.