I installed Ubuntu 8.10 x86 (32-bit) on my Dell Inspiron 1720 (4GB RAM, 160GB 7200 RPM drive, Core 2 Duo at 2.4GHz, multiple external USB drives - some ext3, some NTFS).
With the exception of some very minor glitches (most of which I caused :)), everything works great including, but no limited to:
webcam sound wifi printers (several) VMware Workstation 6.5.1 with an XP guest (for Outlook 2007, iPhone)
The only thing not working is hibernation/sleep. It either fails to save or fails to load later (sometimes one, sometimes the other).