I started using these guys about a year ago and haven't looked back. Highly recommended for the shortcuts feature alone, let alone the added security they provide.
Might be a good service, but the name is highly inappropriate. Censorship is the opposite of being open. Perhaps "CensorDNS" would have been more accurate.
You've got a point about the name, but the filtering is opt-in and when a site is blocked by a filter you get a message explaining why. You can use it as plain old free DNS if you're looking to avoid the ad-filled failed lookup redirects that ISPs have been pushing lately. All the extras are completely optional.
Another advantage of OpenDNS is security. It's rather coincidental this got posted on same day a massive DNS vulnerability was leaked: http://news.ycombinator.com/item?id=252865
I would hope that all the major ISPs have patched their DNS servers by now, but if your not sure it might be a good idea to switch to OpenDNS, at least temporarily.
OpenDNS also uses their community to drive new features and tag new malware sites. Users submit ideas and vote on them in a Digg-like interface. And when a user blacklists a site and tags it with a category, other users are asked to verify. If they do, the site is added to the general category blacklist as well.
