About a month ago I put some initial reactions to the Thomson Reuters Data Citation Index into a public note. I received some requests to do a more formal version of the same and have finally been able to do so at http://z.umn.edu/trdci. It's a Google Doc that should be public and should allow comments.
Our trial period ended in early December and it may be that some of the problems I describe have since been resolved. It's also possible that some of the oddities I noted would not have been present had we subscribed. Nonetheless, even if all the problems went away and it was a perfect version of itself, I'm still not sure that the UMN libraries would have chosen to subscribe. The annual fee was very, very steep.