Nice article at passingnotes.com on Furl:
However, as a twist, Furl extends this capability to include all of your permission level access sites. This means everything that you are paying for from databases to subscription news sites to online receipts of purchase. Think about this for a minute. If you are bookmarking sites and terminating subscriptions, you are losing content. Furl removes this information access obstacle. You are filing away your own permanent copy when you Furl that screen, granting you digital access forever.
A couple of interesting twists on what you can do with Furl…definitely worth Furling.