Kenneth E. Harker maintains a quite valuable database at http://www.linux-on-laptops.com/ . Please have a look at his site to get current information about laptop related mailing lists, newsgroups, magazines and newsletters, WWW sites and a big database about many different laptop pages.
To join the linux-laptop@tuxmobil.org mailing list visit the subsription page at http://tuxmobil.org/mobilix_ml.html. There you may also find the list archiv.
To join the other Linux-Laptop-Mailing-List write a mail to <majordomo@vger.kernel.org> with subscribe linux-laptop in the subject. You will get a confirmation message than, which you have to reply accordingly. As far as I know there is no list archiv.
There is now a debian-laptop mailing list. Any questions or discussions concerning running the Debian/GNU Linux operating system(s) on laptops are welcome. Send mail to <debian-laptop-request@lists.debian.org> with a subject of subscribe. Or visit the
http://www.debian.org site and use the online form.
Also recently founded was Running Linux on IBM ThinkPads, to join send an email to linux-thinkpad-subscribe@topica.com, to post send mail to linux-thinkpad@topica.com . See
http://www.topica.com/lists/linux-thinkpad/.
Lionel, "trollhunter" Bouchpan-Lerust-Juery, <trollhunter@linuxfr.org> has written a similar HOWTO, please look at his laptop pages http://infonomade.linuxfr.org/index.html (French version) http://infonomade.linuxfr.org/indexen.html (English version).
Newsgroups are comp.os.linux.portable, comp.sys.laptops .