This morning I have installed Snap Preview Anywhere code on my blog. It enables you to get a glimpse of the other sites I'm linking to, without having to actually leave my site. By rolling over any link, you get a visual preview of the site, thus eliminating wasted "trips" to linked sites.
I think this cool usability feature might, in fact, influence users to stick longer on my site, increase the overall feel of quality and is just plain cool.
Let me know what you think of this feature!