I've found that by threatening legal action I am always routed as quickly and efficiently as possible to the legal dept. The companies attorney most always has more information than tech support, so that does seem like the place you want to be
A quick review of the TOS turns up:
DreamHost Web Hosting makes no warranties or representations of any kind, whether expressed or implied for the service it is providing. DreamHost Web Hosting also disclaims any warranty of merchantability or fitness for a particular purpose and will not be responsible for any damages that may be suffered by the Customer, including loss of data resulting from delays, non-deliveries or service interruptions by any cause or errors or omissions of the Customer. Use of any information obtained by way of DreamHost Web Hosting is at the Customer's own risk, and DreamHost Web Hosting specifically denies any responsibility for the accuracy or quality of information obtained through its services. Connection speed represents the speed of a connection to and do not represent guarantees of available end to end bandwidth. DreamHost Web Hosting expressly limits its damages to the Customer for any non-accessibility time or other down time to the pro-rata monthly charge during the system unavailability.
which essentially means that you are on your own.....
FYI - Dreamhost provides hardware and bandwidth... no-where do they claim that they provide backup services.
I'm sure you attorney will want all these links:
Acceptable Use Policy http://www.dreamhost.com/aup.html
Anti-Spam Policy http://www.dreamhost.com/spam.html
Unlimited Policy http://www.dreamhost.com/unlimited.html