See my signiture for the social bookmarking site. I am interested in getting some social bookmarking site user reviews and see how I might improve this. I am thinking add photo of each website to each entry I am creating a firefox extension for people to install in firefox that will add favorites to my site with a click of a button. plus it has some extra goodies that you need to stay tuned for.
The design feels a bit empty, also I don't like the different sized texts in the right handside yes, you surely need some images there also you need some kind of a header for the site
it looks professional and almost excellent. the problem is that sites like that are dime dozen today you aren't much original, are you? althogh firefox extension might help, but I'm not quite sure. you will need strong advertising campaign to succedd, IMHO