HP Pavillion dm1-3105ez
How does it do with Linux? Well, everything that I have tried so far installs and runs (openSuSE 11.4, Linux Mint 11, SimplyMEPIS 11, Ubuntu 11.04, Debian 6.0.1). But none of them recognize the Ralink WiFi adapter, so I have to use wired ethernet, and all but openSuSE have significant problems with the Synaptics ClickPad. That, however, is the first glimmer of hope - openSuSE gets the ClickPad absolutely right, it moves, clicks and taps very reliably, and it even has a small LED in the left corner which lights up while you are typing to show that the touchpad has been disabled - so you can't accidentally send the cursor zooming across the screen with your thumbs. When it works correctly like this, I have to admit that I actually kind of like the ClickPad. But when it does not work correctly, in various ways with all of the other distributions, it is guaranteed to send you screaming into the night, so I just use an external mouse and forget about it.
The Ralink WiFi adapter is an even bigger problem.