First off, new features that are available in both scripts (either due to re-use of wakautils.pl or kopipe magic):

• Thanks to coda, there is now support for networked includes. wakautils.pl now has a function named get_http() which does HTTP downloads with caching. It can be used in header.html and friends by putting in a <const get_http("http://domain.com/header.html")>
• More options for displaying IDs. There are now "ip", "host" and "mask" options that replace the ID with either the poster's IP address, host name, or masked IP address. The masked IP is encrypted (and will change according to the thread, day and board options), but similar IPs produce similar strings.
• Bugfixed Javascript code. Cookies work better, and >> quoting should behave more sanely.