For the record, I'm in a very similar situation to per12.
All of my sites running on DH's shared hosting are fine, but my most important site that's running on a VPS is completely broken, and has been for over 3 days. I've filed three different support tickets and they've all been completely ignored from what I can tell.
The fact that there's a problem is horrible, and the fact that it is still broken after three days is worse, but the fact that there still hasn't been ANY communication or even an acknowledgement of an issue is by far the worst part. That's the only reason I'm posting here, because I really don't have any other outlet.
The site (http://trainyard.ca) was down for a couple days, and now it's back up... but only half of the content is there... there are random files missing all over the place. Whenever I try to ftp anything up to the server, I get an error message saying "no space left on device".
I'm getting many emails and messages every day from users who are frustrated that the site doesn't work. All I can tell them is that it's broken, but I really don't have a clue what exactly is wrong, or even how long is going to take to fix, or anything, because DreamHost isn't communicating with me at all.
I should add that I've been with DH for 6 years, spending many thousands of dollars, and up till now I've a big advocate. This is really souring my enthusiasm, to say the least.