OK, here's a quick report. Installed Ubuntu Dapper Flight 7. Couldn't resize the Windows NTFS partition; must be a bug because the Ubuntu 5.10 CD worked fine for that task.
Video: Works great out-the-box with 3D acceleration. To get the native 1280x800 resolution, you need to install the 915resolution package and tweak xorg.conf
Sound: Again, all fine. Front-mounted speakers are pretty good.
Input: Touchpad works well, including tap-to-click. Gnome has a little notifier as you use the Fn key to change volume.
Network: Onboard ethernet works out-the-box. Wireless is a bit trickier: you have to extract the firmware from the Windows driver, so that the [i]bcm43xx[/b] kernel module can load it. I took the firware from the driver on the Windows partition and the machine locked up solid. Found an older driver on the net -- now recognises wireless networks, but won't connect properly. Needs more investigation.
Modem: A WinModem. Apparently works with some special driver -- not checked yet.
On the whole, very little fiddling required, thankfully! If wireless support is critical to whatever you're doing, it may be worth researching the support before. It'll probably work given enough experimentation with firmware versions. Good solid laptop, and a bargain for the price.