One of the more frequent questions I get concerning Tapestry is ... how many sites are using it in the real world? It's a tough question, since I generally only hear from people who have problems and not nearly enough success stories. I asked around on the Tapestry mailing lists and got some pointers to a few sites ... here's just a few (that had cool logos).
Shopping.com's main site just switched over from Perl/C++/CGI to Struts, but many of their current ancillary applications, such as Merchant account management, are done in Tapestry. They expect to use Tapestry on virtually all new internal and external web development.
The NHL may be having trouble, but it isn't because of Tapestry. Eric Everman, who created the site, tells me he is happy to return to more Tapestry work at NHL.com, after a painful sojourn into Struts development for another client.
Erik Hatcher and Jamie Orchard-Hays were part of the team that built a suite of applications for Darden ... in fact, that was one of my first Tapestry training engagements. The same application has been skinned and reconfigured for a number of clients, including the University of Chicago Business School.
And a few more I have no real information about (but I liked their logos):