Well, I got 2 AMD systems I can help test.

1) Compaq V6305ca Notebook
- Turion x2 1.6ghz
- 2gb ddr2 ram
- Nvidia 6150go + MCP51 Chipset - PATA DVD, SATA HHD
- Conexant Sound chip
Currently running ubuntu gutsy and trying other linux stuff. whatever I can get my hands on.

2) Self built AMD BE-2350 Athlon X2 CPU
- Asus M2A-VM HDMI
- 3gb ddr3 ram (2x512mb, 2x1gb) A-data ddr2 667
- IDE Pioneer DVD
- SATA Seagate 320gb HHD
- Compro E500 PCI-e x1 TV Tuner
- PCI Atheros Wifi Card. 5006
- Built-in Firewire
- Built-in Video Card x1250
- Realtek ALC888 Sound chip
Currently collecting dust because I can't get it to work properly as a media center,
with Windows or Linux.

My current main machine is an INTEL Hack. Running Toh Leopard DVD, efi v8, vanilla kernel and update to 10.5.1
Intel Core 2 Quad Q6600 G0 @ 3ghz (pin mod) 1.333ghz fsb
4gb ram ddr2 800 muskin
Colorful X5 (P35) Motherboard
PCI Broadcom WIFI Card Buffalo
Nvidia 7900gs gddr3 256mb mod to Quadro FX 3500 OC to 650mhz core and 1700mhz memory
Sata DVD. Sata Raptor 150 HDD, Sata WD Caviar 320 HDD
USB Bluetooth, PCI Firewire

Sound not fully working, only getting output, so its ok. Have not tried mic. front panel not working.
ICH9 only 1 channel (2 sata working)
Jmicron (working in ACHI mode only)

If you need a beta tester I have 2 machines to test out...