Using Vista Business. Wired networking works as expected and dependable. However Vista loses the Wireless networking (IP)after a period of time on the WirelessLAN MiniPCI adapter. If I shutoff the Wireless Radio and and turn it back on then IP connectivity is re-established. I have seen variants of this but nothing specific. This is getting very annoying.

A not so uncommon problem you have there. First thing you should do is to upgrade the driver to thelatest one and also upgrade the firmware of your wireless router.Also have a look at the following Microsoft hotfixes; http://support.microsoft.com/kb/933657/en-usand http://support.microsoft.com/kb/937168/en-us