Timesink additions

Library Thing has added a new feature which advises the library cataloger which of his/her books are part of a series. I foresee problems for those of us who are compulsive “completists.” The feature allows the user to determine which parts of a series he doesn’t yet own, which could lead to excessive book purchasing.
Then LT went ahead and improved it. Now when you click on an author’s name you can see which books are standalone and which are parts of a series, and you can also see all the series you own from your own profile’s page.
If you haven’t bought your membership yet, what are you waiting for?