Ubuntu 9.04 Jaunty
Kernel 2.6.28-11-generic x86_64

Sun Ultra 27 Workstation
Intel Xeon W3520 8-core 2.66GHz
8MB shared Level 3 cache
256K Level 2 cache per core
3x2GB DDR3 ECC unbuffered DRAM 1333MHz
500GB SATA Disk Drive
NVIDIA Quadro FX 380 graphics accelerator
Gigabit Ethernet 10/100/1000BASE-T NIC
16x DVD Writer/48x CD-ROM Writer
Sun type 7 keyboard
SunL7ZF 17" LCD screen

Virtually everything worked "out of the box".
The keyboard was not detected properly so some superfluous keys such as "find", "again" etc don't work.
The NVIDIA graphics drivers had to be loaded via System > Administration > Hardware Drivers.
Other than that everything was properly detected.
It was a clean install and the machine runs beautifully