Like rlparker said, you most likely will not be able to run teamspeak on DreamHost.
What you are looking for is a dedicated server solution or co-location, or a company that makes its business from hosting server applications like teamspeak. DreamHost is not one of them.
The teamspeak web site has a list of ‘Authorized Hosters’ that you can find here:
http://sales.tritoncia.com/hosters.php?l=1 or perhaps you can ask around on the teamspeak forums.
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