The DWT-Linux was tested successfully with this configurations:
OS            : Linux Ubuntu 7.10
Compiler      : DMD 1.025 .. 1.027
Runtime       : Tango SVN trunk rev. 3145 .. 3321
DSSS          : 0.75
Libs packages : libgtk2.0-dev, libxtst-dev

Note: DSSS has by default the feature active to compile one file a time.
For DWT this make compilation _very_ slow (> 10 min).
By switching this off, and make it compile several files at once, the
compile time decreases to <15sec on my machine.

dsssinstall/etc/rebuild/dmd-posix-tango
Search for "oneatatime=yes" and change to 'no'.