Interesting uses of WorldCat affiliate tools and search extensions

For a report I'm writing, I'm hunting around for interesting
and
successful uses of end-user-oriented WorldCat affiliate
tools and search
extensions (or interesting and UNsuccessful deployments...),
such as:

* WorldCat Search Box. Creates a WorldCat search box on home
pages,
blogs, and other websites; available preconfigured in two
sizes, but (I
think) can be tweaked for other configurations. Requires
(free) WorldCat
registration.  

* WorldCat links with embedded search terms. OCLC provides
syntaxes for
deeplinking to WorldCat results, suitable for embedding in
courseware,
etc. 

* Other things: a Firefox browser search extension and a
Yahoo! toolbar
for Internet Explorer that allow WorldCat searches from
browser
toolbars, and a Google toolbar for either Internet Explorer
or Firefox
that links directly to WorldCat results when it detects
ISBNs on web
pages.  

(Interesting uses of xISBN, WorldCat registry search/detail,
or the
OpenURL Gateway also welcome, but not as central.)

I see some of these tools on various library websites, and
use a couple
of them myself, but I'm looking more carefully for the
benefits/payback
of these tools beyond "yup, it's on our website"
or "I use it myself." 

Writing under the umbrella of biblio-officialdom I am -- 

Karen G. Schneider
Research & Development
College Center for Library Automation
http://www.cclaflorida.org

Voice: 850-922-3159
AIM/Email: kschneidercclaflorida.org  
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