From what I hear, she's actually doing better. Her last blog post was on December 18 of this year, and apparently, she's feeling better. As much as I want her to continue with this as soon as possible, I'd rather she take it easy until she completely recovers.
SHE'S NOT DEAD. If she would I think it would be on her blog and comico. There was no information about that. I think Casey misunderstand first "I miss ssamba so much..." comment as she is dead not that people are just MISS her cuz she's not active anymore because of her illness.
I agree with @saizon on that one, she really needs all the rest she can get to get better, but I can't say I don't appreciate this kind of things, I love how she still gives out these little tid bits on FF, Every time I some of them, my heart melts!! >.<
@Alextasha Thank god it was just a misunderstanding. I really thought someone updated her blog once again to say such terrible news. Luckily, is nothing of the sort.