Well, that site is displaying an empty directory, and it is resolving to apache2-igloo.jasper.dreamhost.com for me. If it is not doing the same for you, then likely the DNS you are using has not yet been updated, or you have something stuck in a cache somewhere.
You might try http://wiki.dreamhost.com/Flush_DNS
As for why I can’t see the content you have uploaded, and you can’t see the directory, it sounds like you may have uploaded the content as a different user (which would explain why you can’t even see the directory!).
I suggest double checking under Manage Domains in the Web Panel to make sure you are uploading as the same user that the domain is configured to run under.
Other than that - part of what you are describing sounds like just plain old DNS update lag.