http://files.privateerpress.com/nq/n...al_Edition.pdf
each warmachine faction except convergence is getting a journeyman warcaster. that seems neat. some of them have some nice rules, others look like they'll just be there to let you run an extra jack with 3 focus each turn. Not sure how much I would use the Ret one, but she seems cool enough that i would give her a try, maybe with a cheap heavy and a griffon.
the cygnar/cryx caster seems pretty solid. he has some of the standard strong spells for each faction and some strong weapon abilities. the feat sounds really good in Cryx and decent in cygnar.