Merlin

I've been exploring Merlin and have added it to my Blogroll. I particularly like the Web 2.0 Award Winners short list http://www.seomoz.org/web2.0/short Here you can look at the top three winners in each category and directly link to it as well as nominate your favorites for the 2008 awards.
I also found the Learning Links very useful. Search engines were not particularly intuitive, however. RSS4LIB was a useful blog that explores RSS links of use for libraries.