Hello kgdatsme  

 and welcome to the boards!
Wow, you've really been through the wringer lately. Things must have been pretty bad for your W to end up hospitalized... I'm so sorry it got so intense.
I have heard of at least one former member here whose wife had BPD and BP. She also had multiple hospitalizations and those were not her "rock bottom" of "seeing the light"; from what I recall she continued to struggle with blaming him inappropriately, though medication for BP and depression did help her somewhat.
Does your W accept any of her diagnosed?
Has she ever done inpatient or outpatient before? How long is this current outpatient supposed to last, and is it focused on BPD or BP specifically?
Do you two have any kids?
And do you have any support for yourself right now (therapist, counselor, family member group attached to the IOP...)?
This sounds like a stressful time, so please do post and share here when you need to... we'll be here 
kells76