Ever run into that problem of trying to recall a website — and remembering what it looked like, but having no clue the name of it? Maybe you were lucky enough to bookmark it, but even then, that may not help you.
There should be a web app that pulls in your (RSS feed of) del.icio.us bookmarks and displays them as thumbnail screenshots. Something like this exists, but it’s limited — it’s called thumblicio.us, but it uses the limited thumbnail inventory of thumbshots.com.
Snap seems to have quite an inventory of thumbnails — maybe they could make a plugin or web app. Or maybe they have an API that I can’t find on their website. Or maybe you could build something that starts amassing tons of thumbnails yourself.
Not sure how you’d monetize this — I presume advertising; particularly if someone’s bookmarks contain certain websites, competitors could display their offerings right next to them.