Yes, I'm basing it off of a base install. I should probably mention that plugins are available that would enable many of the features that do not come with the base install.
I've seen something called Wuh Wuh that looked like an interesting souped-up WordPress, with many plugins pre-installed.
I should add Blosxom and Grey Matter to the list. GM is listed in many places for importing. I don't think any development work is going on there these days, but I could be wrong. Others have suggested adding pLog and Nucleus.
I plan on adding (yes, I'm being tricky) a comment to each of the packages noting how responsive the support channel (forum) was on responding to my request. A preview: WordPress and pMachine totally dominate this category. One specific failure was TextPattern, where I got no responses. Interestingly, the MT forum responded a lot, but didn't do much to answer my questions. (It reminds me a lot of /., actually) All of the other forum requests were answered almost instantaneously with the exact information I needed, some more helpful than others. Of course, this experience is my isolated attempt to get info, but you figure that in a sea of bloggers seeking answers, you will be only one voice of many.
With the recent MT fallout, it's nice to see what everyone has to offer.