Snap Previews are the sneak-peeks you get on this wordpress blog when you mouse-over a link. However, unlike WordPress, the ValueWiki Snap previews are less obtrusive. The preview will only generate if you mouse over the Snap icon.
Zach and I love this feature, as it lets you view a site before deciding to navigate. Honestly, it keeps people on ValueWiki longer. I may submit this as a technical proposal for Wikipedia, since it took Zach about two minutes to build and is fairly useful. Is there any chance Wikipedians will go for it?
Update: I added this proposal to Wikipedia, here. Feel free to add your two cents.