Their (DreamHost) prices are ridiculous (ie low), and to keep them low, they can only spend time on things that have an identified market (they say this in their FAQs or KnowledgeBase or whatever its called). It's the main reason they don't provide PostGres.
I guess FCGI for Django hasn't hit the big time for them... I've looked at Dreamhost (cheap, ridiculous storage and bandwidth, very much mass-market driven), TextDrive (not as cheap as DreamHost, but still good, ok storage and bandwidth, PostGres and other nice bits of software - but weird usage 'no webdevelopment'), A2 (from www.43folders.com) (cheap, low storage and bandwidth, PostGres or MySQL), Zettai (more expensive, unlimited domains, PostGreSQL and/or MySQL, Zope and Plone) and Gypsy hosting (same price as Zettai - $24.95/month, full Django, Postgres, Apache2, ok storage and bandwidth - currently not taking any more signups) I've not plonked down money for any of them yet. So you pays your money and you takes your choice... ;) Cheers, Tone