Rob,
Like the name, but I'm prejudiced... ;-)
There's a great product called Firebug for Firefox that helps identify the CSS elements.
If you use it, you'd see:
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Changing the 21 to 1, knocks 20px of padding off the top, moving the highlight up closer to the slider. Note, you cannot use negative values in padding, even with !important.
Other elements can be identified where select tweaking can result in a gain of 50px total savings. Each selection, such as Highlight and Features have a Contentpad with a 15px padding. That can be customized to make the padding-top: 0 for the highlight, and padding-bottom: 0 for the features.