If you are be sure to listen to Security Now! episode 155 (“How DNS works”) to learn about the DNS exploits circulating the internet these days. Also you might want to test the DNS servers you use to see if they they are subject to the attack.
I know Comcast and some other major ISP’s in the US and England are having problems since they haven’t patched their DNS servers yet.
I do a lot of DNS lookups using dnsstuff.com and finally got around to doing a bookmark for it to make it easier to use. The bookmark makes it possible for me simply to write “dns <hostname> <record-type>” in the address bar of Firefox to do the lookup instead of having to go to the site, locate the field, input the domain name and click the submit button. The bookmark automatically does a lookup for an A-record if no record-type is specified as the second parameter:
To add the bookmark to Firefox right-click the following link and add select “Bookmark This Link…”. Once that is done you need to edit the bookmark (right-click it in the bookmark bar and select “Properties”) and add a Keyword (I use “dns”).