No need to defend Dreamhost to me. I've been with them for 2 or 3 years and have quite a few sites hosted here. I even set up a few test sites with another host to see if I was missing out on anything. I wasn't. Dreamhost is the best shared hosting provider that I've had personal experience with and are still my #1 recommendation for this type of hosting.
However... I have noticed a marked difference in the frequency of problems since their physical move several months back (not just the last 2 weeks fellas). I have also noticed changes in the names and capabilities of the support personnel in this time period as well.
Putting 2 and 2 together, these problems and the recent rapid growth, and it makes me wonder if they're headed down the same "growing pains path" that I've seen other popular hosts encounter (recently discovered PHP and Apache vulnerabilites of late have probably not helped at all). If so, for the sake of my fledgling business, my own personal sanity and the great people at Dreamhost, I hope they have plans to handle the growth in a way that will continue the levels of stability and support that have made me such a strong DH supporter over the last few years. Even if it means halting new sign ups (if it comes to that) until they can support them in the way that they have traditionally: extremely well.
That last paragraph is pure speculation on my part but it's how I'm feeling at the moment because of the mentioned irregularities. And with that being said, I'm more inclined to believe than not, that Dreamhost will handle their business, and mine, with all the faithfullness and professionalism they can muster. Their history indcates that they will.