Kenneth E. Harker maintains a quite valuable database at Linux on Laptops . 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 and up-to-date database about many different laptop pages.
The author of this guide maintains the TuxMobil Linux Laptop and Notebook Installation Survey and a Linux compatibility database about different laptop, notebook and PDA hardware, such as PCMCIA/CardBus/CF-Cards, graphics cards, sound chips, IrDA devices, and more.