Is There A Blank Child Theme for UpFront?

Team WPMU,

With the recent updates to Upfront, specifically the ability to better handle auto-generated content (buddypress, Marketpress, etc), I'm looking at it for more projects or to update current ones.

However, I'm running into problems with a number of the pre-sets in existing themes. While each theme is nice, each has their own foibles, especially regarding how blog post meta-data is presented and treated (date, time, comments, etc).

Is there a "blank" child theme available? Some kind of template that can be used to start fresh? Or, failing that, are there quick methods available for tailoring how core elements (blog post meta data being a HUGE example) are arranged and presented?