Yes, Virginia, you can use Zotero with the new University of Toronto Library catalogue interface. Click on the link below to see a 1 minute tutorial on how to do it.
How to Use Zotero with the UTL Catalogue (http://screencast.com/t/YjBjMGU1NG)
The screen capture software I used to make and share this tiny video is called Jing. It's a great little piece of software that has all kinds of potential uses in the library/reference context. It's available as a free download from www.jingproject.com