My current machine suits me fine, but as the details for Nehelem based Xeon boards leak I have to admit to being mildly turned on:
http://planet64bit.de/node?page=2
http://www.theinquirer.net/inquirer/new ... 0-pictured
http://www.channelregister.co.uk/2008/1 ... o_nehalem/
The cost is retarded for most people's needs, and the Carbon output will make kittens cry, but it's hard to...must...resist....