My ISP's DNS servers seem to suck, so I looked at OpenDNS, after seeing it mentioned a bazillion times on
Wired's compiler blog.  I have a FreeBSD box running a local caching nameserver anyway, so I told it to use the OpenDNS servers as forwarders instead of my ISP's (Rogers).  Instant faster lookups, hurray!  I also played around with the DNS blocking things (having a wilful stepdaughter can be trying, let's just say that), and successfully blocked my wife from facebook.  So, I figured it can't hurt too much, and I'm letting it block most categories of adult websites now.

So far, so good.  We'll see how it goes long-term.