I use DD-wrt on my linksys, according to the article and the forums at dd-wrt.com, this software IS potentially vulnerable.
Bottom line though is that if you have a good router password, you should be OK.
Not an issue, as the article says, use OpenDNS.
Just go into your router’s configuration and unselect the “DNS from DHCP” setting and manually put in the OpenDNS IP addresses.
I’ve been using OpenDNS for months now and it’s much faster than COmcast’s DNS.