That is a mistake on our part! We were thinking of charging and when we made the changes we planned on charging. Since then we have had a change of heart but have obviously forgotten to change that text - we will do that tonight!
With regard to the Delicious question - we get that a lot. Yahoo could be shutting Delicious down, which would be a bonus! But the best explanation I can give is if you are a visual person, like things laid out in a nice way and you also want to know what your friends are bookmarking then we are a good fit. We offer Twitter like functionality whereby you can follow people - and then therefore see what they are bookmarking. If PG signed up to Favilous, you could follow him and see what sites and articles he bookmarks - we think this is a cool feature which Delicious do not offer.