Nor does Dictionary.com have the appendix of IE roots. (I’m not wild about tracing roots back to IE, but it was nice to have an easily accessible listing of the roots.) I’ve been holding off updating the resources page until I was sure that this was permanent thing and not a glitch where someone at Bartleby forgot to update links or upload files.
(The problem with IE roots isn’t so much in the scholarship behind them as in how they are used. Too many people take them as some kind of definitive dictionary of a particular language, rather than a general indication of what the collection of dialects that made up PIE might have looked like.)