Intermittent Connectivity Problems with Vista

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 I have a Vostra 200 series desktop (or at least i think thats the model), but either way its running Vista Home Premium that is completely up to date with patches. It is connected to a Linksys WRT54GS router with a PCI-Wireless G card. Lately the thing is having problems where it has "Access: Local and Internet" connectivity but randomly drops to "Access: Local Only" and other times just drops connection all together and then reconnecting takes 3-4 minutes and its fine for about 5-10 minutes. I have double checked all the router settings, verified the network settigns in Vista, verified DHCP is properly functioning, upgraded router firmware, reinstalled/updated the Wireless-G card drivers and nothing seems to help. After searching around on the internet it seems to be that it is just a Vista problem and nothing else. Has anyone else came up with a solution to this problem? I've heard people have the same problem but have an XP machine work perfectly on the same network. I plan on bringing an XP machine to that location tomorrow to try to verify it being a Vista problem. Any help would be great.