Donald,
Thank you for the input. I'm not sure that I'm ready to separate it yet, but I'll be sure to borrow my Dad's chainsaw when I get to that point.
I'm glad to know it's a pretty tough plant. Reading what you did with yours, I think I'll just cut back most (but not all) the fronds and pot it in a larger pot once it warms up here. Yours made quite the recovery if you cut back all but about six fronds!
My MIL has one of the more common 'Asparagus Ferns' in her yard, but it's in a pretty shady area, so I think that keeps it from taking over the yard. Surprisingly, it's survived frost and snow! The ones she had in containers did not, however (I'm sure to keep mine away from winter rain and bring it indoors if it ices, snows, or the temperatures are too low).
I'm sorry to hear you lost half of yours, but at least you have some left over to separate if you want to do that again.
Thanks again for the advice, I'll be sure to post an updated picture once it bounces back.
Planto