Hi Ken, my opinion is that the weight of a dmoz link isn't given a special boost - but it is a very good link. Inherent to dmoz is that it is used by others to seed their own directory listings. So one listing in dmoz can in turn result being included within many other directories also. Many years ago, I think google wasn't as good at filter out this duplication and a listing in dmoz did have a much larger impact - but today my experience is that the weight of a dmoz listing is good but not something that is treated as special and above the rest.
It's a natural fit as Google was employing DMOZ before and it was only a matter of time really.
This isn't a new thing, but instead an article about how to manipulate the descriptions that do show in google such as using the noodp tag and meta descriptions. I tend to modify the text/content within my site's instead including text that I want to appear near the keyword phrase that I am targeting.