These f#ckers are suing WaMu, WMI, and/or whoever in as many ways as they can.
My initial response is that their claim is bull$hit. I might be wrong, but if these guys are suing them outside of bankruptcy, I don't think they are supposed to be filing a claim against them in this court. Could be wrong, but here is a copy of the lawsuit these f#ckers filed back in January of this year.
Boilermakers National Annuity Trust Fund v. WaMu Mortgage Pass Through Certificates et al