Ok, so basically, they're saying they've added a few modules for the 'one click' install stuff.

From: 	DreamHost January Newslettery 
Subject: 	DreamHost Newsletter v11.1 January 2009
Date: 	Mon,  9 Feb 2009 20:46:06 -0800 (PST) (Tue, 15:46 EST)

*snip*snip*snip*snip*

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5.

I'm sure you all love Drupal however there are a couple of design decisions that are less than ideal in all circumstances.

One of them is the path alias handling, you know - the stuff that lets you have a page accessible via mysite.com/fruit/bananas instead of mysite.com/node/1234

Recently I purchased a DreamHost account, seems to go pretty except for a few small things.
Bottom of this article is my full PHP5+IMP tar ball ready for download so you can get going with the good stuff.

Annoyances with dreamhost..
• Dreamhosts's default PHP5 does not have IMAP extention installed
• You gotta pay extra per month for SSL portforwarding to your IP address (what a jib!)
• It's a cheap hosting environment so no they dont let you just edit /etc/php.ini and add lib_imap.so, as theres lots of nasty php scripts out there that will do all sorts of terrible things to their PHP 5 / IMAP servers. - so you gotta compile your own PHP..

Dreamhost have their own webmail, so this isnt about installing their existing webmail on dreamhost
Now not being scared of a bit of dirty work i googled for dreamhost compile php cgi-bin and followed the following http://blog.dreamhosters.com/kbase/index.cgi?area=2538
One thing they dont tell you, is to 'strip' your compiled PHP5 binary, it will reduce it from 60mb (yes 60!) to 6