Joe Kraus is my name.  I am the science and engineering librarian at the University of Denver.  You can find out more about me at some of my other blogs here and here.  I bought the URL sciencelibrary.org about 10-11 years ago through Yahoo! before I knew any better.  It simply redirected to my webspace at http://mysite.du.edu/~jokraus/scilib/.  The three sections were science databases, resources for librarians and for kids.  But, these were designed in basic HTML, and they look so 1996-ish.  It was also a pain to update and FTP new html files.  Now that I am using tumblr as the spot for sciencelibrary.org, I will be able to upload new resources a lot easier.  Hope you enjoy.