Is Scotty still alive in 2003? Absolutely; see ...
[ ... key players: Landers, Juergen, Finzel, Razzell, Hobbs, ... 8.4 ... ambitions ...]
http://www.ibr.cs.tu-bs.de/pipermail/tkined/ points to an active mailing list where Scotty and other related tools are discussed.
Users previously pointing to xray.mpe.mpg.de should note those URLs are no longer working.
Note also that as of Summer 2003, the CVS version of Scotty will work with Tcl 8.4.