Just remembered to check my test object and to my pleasant surprise, I see keep-alive now.
Not sure when that changed but keep up the good work dreamhost.
Update: weird, I sometimes see it, sometimes not.
Are there some servers that have newer software than others?
Ah okay - this is my fault, one of my testing tools was not sending "keep-alive" in the request headers.
But it's definitely been fixed from what it was last month.