Sorry to say, but after struggling with Qemu on Debian Etch, Debian Lenny, Ubuntu 8.04 and Ubuntu 8.10, the conclusion is: DONT!
The reason is not that it’s hard to set up or use, quite the contrary. The reason is that when using Qemu and VNC simultaneously, the kernel dies from time to time. Sometimes it’s the Qemu-image that segfaults, other times it’s the servers kernel that segfaults.
Sun have a far better – and more stable – alternative, use it.

