so is there an equivalent to the psych nursing degree in the rest of canada/the u.s?
no there isn't!
since you already have a degree the best alternative for you in my view is to purse an registered nurse license .
this would be transferable to any province in canada and you could easily be eligible to write the nclex -rn for the us.
you would have the equivalent of 2 degrees, one in psych and the other in nursing.
there are some education programs in canada that accept degree graduates for an accelerated nursing program. i am not familiar with the one at ubc but if that is what it does then you should go for that.
there will be one at kwantlen polytechnic university soon but it isn't running yet and i am not sure if they will meet their target start date on jan 2011 but you could investigate that through their website.
rpn's are pretty much a western canada thing, is this correct?
yes only in bc, alberta, sask and manitoba.
really - you have so many more options with a registered nurse license. the scope of practice is much broader and you could even go on to take a nurse practitioner license and/or specialize as a clinical nurse specialist in psych.