[Scroll down the page of the links and find the "Download" button.]
Update 6/19/2007 -After checking back on the downloads page, it would appear that new versions of the driver/software has been added on 5/25/2007, this is version 220.127.116.11, links below are updated. Thanks Flamand. After installing the updated drivers/software (which took a few minutes) I can't say I've noticed any performance improvements, or changes to the software, however they added a description to "HD Mode" -
Also, I think Ad-Hoc QoS setting may be new, however I'm not 100% sure.In a wireless network environment where several access points are nearby, this feature will reduce interference and improve your wireless connection.
Windows XP - Intel® PROSet/Wireless Network Connection Software [V18.104.22.168_XP32.EXE] - (5/25/2007)
Windows Vista - Intel® PROSet/Wireless Network Connection Software [V22.214.171.124_VT32.EXE] - (5/25/2007)