I have 2 Wireless NIC cards (one for home and one for work) that I use in CentOS 5. The one at work is setup for WEP and the one at home is setup for WPA. In /etc/resolv.conf, I have the first DNS entry setup for home and two more setup for work. The home connection works fine, but it takes almost 2 minutes to lookup a URL at work (I swapped DNS entries in resolv.conf and had the opposite issue, so it is definitely DNS entry order in resolv.conf). For whatever reason, the first DNS entry in resolv.conf works quickly, while it appears that the 2nd and 3rd entries, if required for a URL lookup, slow web access considerably.

Is there anyway to setup separate DNS entries per card? If not, is there a better wireless connection manager (I am using Gnome) than NetworkManager (which doesn't work at work (WEP 128) or at home (WPA)--it works great as long as the wireless connection has no security)?

I believe, as far as the resolv.conf file is concerned, you should set up your networking software to overwrite the resolv.conf file when a NIC receives an address. I think that the long time periods to get DNS resolution are due to the wrong domain being searched before the right one is searched.

As far as a connection manager is concerned I can say that THE reason that I switched to PCLinuxOS was the excellent wireless NIC configuration applets. It is very like Windows. The connection manager shows you all of the available wireless networks, remembers settings for specific networks, and it handles all of the various wireless encryption techniques very easily.

PCLOS uses the system configuration software from Mandriva so you might be interested in that as well.