We are running our Open Source, WebAPP CMS Project ( http://www.web-app.net )on DreamHost, and so are many of our users.
For what one gets for the money we have no doubt that DreamHost is number 1. You can run hundreds of sites on the server for few usd a month, not to mention the harddisk size in gigas and not in MB as in other companies..

To those of you who require more stable services, we would suggest to use DreamHost private server hosting, in which you can ajust the costs according to your or your customer budget and needs.

Promocode, we have literally been covering all hosting expenses with the DreamHost promocode ( see more on our site under "hosting").

Live support: what is all this nonsense above about DH not answering calls? Why don't you simply go here: http://irc.gnu.org/dreamhost and talk to them, there is ALWAYS someone there providing live help.

We strongly recommend DreamHost for companies, organizations and scripting projects.

WebAPP
http://www.web-app.net