Browster

Browster, a free plug-in for Internet Explorer & Firefox, allows users to mouse over Web search listings for an instant view of the content rather than having to wait for the full page to download.
The software, created by San Francisco-based Browster, uses patented "pre-fetching" instant page rendering that serves up a copy of the Web page in milliseconds in a new window on top of the original search page.
Certainly worth a look although I just can't make up my mind whether this is crap or seminal.