There are plenty of things that could be done that don't require the removing the CDA. If websites are liable for user-generated content, then liability will ensure that we cannot have user-generated content at all. Google, for example, has a specific process for you to remove this sort of thing:
http://www.google.com/support/websearch/bin/answer.py?hl=en&...
More generally, you can also get a court order declaring something unlawful, then go here:
http://www.google.com/support/bin/request.py?contact_type=lr...
But as they point out, it doesn't do much unless you get to the root of the problem. Find the person who posted it.
Lastly, way to go NYTimes. I had never heard of that porn site before, but now everyone on the internet can look up that site and that post, making your use of an alias meaningless. Are you really on her side, or were you trying to trigger the Streisand effect?