Andrew,
You posted a list of questions on the mailing list, here's my feedback:
> 1. What features have been included in Mozilla since 1.2 was released that we would want included for K-Meleon users?
To my knowledge the major changes in Mozilla 1.3 are mail related so far.
> 2. Continue work on streamlining the JAR files. This involves replacing XUL interfaces with native interfaces or removing XUL interfaces where we already have native interfaces. I believe that Jason Foss had created a stripped down version that eliminated several hundred K.
Suffice it to say I would greatly welcome this. Are the updated .jar files available anywhere and if not can they be made available for testing ?
The following pref should be made a default in K-Meleon so the xul.mfl file is never created:
user_pref("nglayout.debug.disable_xul_fastload", true);
Also the XUL error page handling is a mess and causes back/forward problems. The error popup works much better, maybe it should be the default as well:
user_pref("browser.xul.error_pages.enabled", false);
> 3. Updated About page. I can't recall offhand who created the updated About page but it's a very nice addition to the browser. Can you update it for the next release? Also, it doesn't work when Javascript is disabled. Can you create a no-script section to handle that?
Are you referring to a different about: page from what's currently in 0.7 ? That works with javascript disabled except the Mozilla version and user agent string isn't displayed as those bits are Javascript. Also about

lugins needs Javascript but that's been true since at least Netscape 4.x. Finally about:config doesn't work but that's likely because it's XUL. In K-Meleon about:config only displays the header line which is defined in a .dtd file in embed.jar.
> 4. Menus configurations, accelerators, etc.
I sent in some accel and menu stuff a month or two ago. How about adding ALT P = ID_PREFERENCES and CTRL VK_BACK = macros(up_directory). Also how about removing the Go main menu item altogether ? I never really for that to be very useful but that's just me.
> 6. Preferences
Are there any preferences that need to be in the preferences panel that currently are not displayed? Are there any preferences that really don't need to be included? Has anyone played with the new editable prefs in Mozilla to see if we can import that into K-Meleon?
Clear URL session history button, clear global history button (if possible).