The most recent snapshot is ecp.0.1.5beta
This version introduces the total-progress bar, which is really neat.

If you want to get the most ultra-recent version, you can use cvs:
cvs -z3 -d:pserver:anonymous@cvs.savannah.nongnu.org:/sources/ecp co ecp
This will checkout the version currently in cvs

For all snapshots, please see the releases directory on nongnu.org