Favthumbs provides thumbnail images (and links) of bookmarks saved on your del.icio.us account.
Thumbnail images are always useful to English Language Learners, but Favthumbs is unlikely to be used by students because, in order to use it, they have to use del.icio.us, and there are a number of better bookmarking sites for ELL’s that don’t require any download (see The Best Social Bookmarking Applications For English Language Learners & Other Students)
However, Favthumbs might just be the easiest way for a teacher to create an accessible webpage for students doing an Internet “scavenger hunt” or Webquest, or if they just want their students to focus on a few specific webpages for an assignment. All a teacher has to do is create a tag on their del.icio.us account and give students this url address — favthumbs.com/ (your del.icio.us username)/ (the tag you gave the links). Students will see thumbnail images and links to the sites you’ve bookmarked.
Pretty darn simple.