I bought a second-hand 17″ HP LCD from a college friend. I got it to use with my headless Dell desktop box, but since it runs Slackware and I work with it remotely, I have the LCD now attached to the laptop as an extended display. Luckily, the ATI Radeon card on the laptop supports dual-heads. I have extended my 15.4″ display over to the external LCD, and, well, suffice it to say, it rocks. A couple of close-ups of my study are attached below. For Windows XP users who are frustrated with Windows not supporting taskbar(s) on extended displays, please take a look at Oscar’s Multi-Monitor taskbar. It is nothing like the native taskbar Windows has to offer, but it is the best I could find.
Additionally, I need to get Slackware to recognise the second display and move half of the desktop over. I have been playing with Xinerama and different configuration settings for Xorg, but to no success (to be frank, I have not yet had the time to do it at leisure). Xorg does enable dual-head support, but it tries to extend the display within the primary LCD, and in so doing messes everything up.