last year i presented extval at my trinidad workshop (esp. the integration and special features in combination with trinidad).
this year i'll give a jsf fullstack workshop. one part of the workshop will show how to integrate bean-validation in a jsf 1.x application via myfaces extval as well as the migration path for upgrading to jsf 2.0.
the rest of the workshop will be interesting as well (for sure)!
if you are interested - just register here!