Planet AMD64 has put up a download section with the latest Windows drivers for the AMD64 platform

So far available:

Realtek AC97 Audio Codec
Drivers for Windows XP for AMD64

RTLAudio.A64.zip
Realtek AC'97 Audio Driver (WDM) 5.10.0.5365

Matrox G4xx Series Drivers

g450_amd64
Matrox G400/G450 AMD64 Driver

HP/Compaq Forceware 53.02
Forceware 53.02

52.14_winxpamd64p_english.exe
Forceware drivers for Windows XP AMD64

X64.zip
VIA 8237 SATA 64-bit F6 driver

VIA Serial ATA Raid driver for Windows 64-bit
VIA Serial ATA Raid Drivers for AMD64

TXTSETUP.OEM
TXTSETUP.OEM for VIA SATA Raid

Silicon Image SiI 3112 SATARaid Controller Windows 64-bit
Silicon Image 3112 SATALink Driver

Highpoint RocketRAID 1820 Drivers
Drivers for the 1820 PCI-X 8-port SATA RAID controller

Silicon Image 3114 IDE for Windows 64-bit
Drivers for AMD64 and IA64

Silicon Image 3114 RAID for Windows 64-bit
Drivers for AMD64 and IA64

Promise FastTrak S150 Driver
Promise FastTrak S150 Driver

Promise FastTrack S150TX2 Driver
Promise FastTrack S150TX2 Driver

VIA Hyperion Pro drivers - BETA
K8 chipsets: K8T800 ONLY

3C940 Drivers
Newer version

Broadcom BCM57xx Drivers
Drivers For Win2003AMD64 should work on XP

ASUS K8V Deluxe Network Driver

Realtek 8169 Gbit AMD64 Driver
Realtek 8169 Gbit AMD64 Driver

MSI KT8 Neo Network AMD 64 Driver
MSI KT8 Neo Network AMD 64 Driver

Check it out