If you want a visual approach to looking at your del.icio.us bookmarks then you might want to try Favthumbs. Just pop in details of your user name (or that of anyone else's) and see thumbnails of each bookmarks. Or most of them - sometimes it doesn't seem to work.
I tend to search my bookmarks using the search functionality and didn't find this approach very helpful, but if you like browsing it could prove helpful. Screen shot below:
Comments