I’ve toyed with the idea of giving my family all my usernames and passwords (or at least, the ones that I would bother leaving a death notice on) in the case of my unfortunate demise so that they can post something to the effect of: “Hi, I’m the (insert relation here) of dotchan to let you know that she’s passed away and won’t be participating anymore.”
Then my cynical side points out that while a handful of my online mates might send condolences, the rest of the internet world at large will say: “Meh, have the world’s smallest violin” and move on.
Right now I’m undecided. I mean, I don’t expect to bite it anytime soon, but then, nobody expect the Spanish Inquisition, either…
So what about you guys? Do you have any interesting post-death plans? (In event of a zombie apocalypse, be advised that I will be shooting you first. :D)
I think it depends on how active your online life is. If you are a prolific and long standing poster on any message boards then I think it is appropriate to let your cyber companions know.
Not here. I’m not active enough for anyone would notice I was gone (that’s not meant to sound pathetic, or as if I’m upset about it). I do have a few online friends who my real life contact details, such as my phone number and name, who’d get notified if I died.
My wife frequents my major internet haunts so I assume the news would travel through her. If we both went, you’ll just have to remain uninformed.
Sadly, yes. My brother and I are both regular members of messageboards (mine being SDMB) and we’ve already promised each other that we’d handle the announcements. Neither of us have a will or a living will, but we’ve got this bit worked out.
Although, if I died tomorrow Athena would probably tell you about it. She’d know right away because my business partner would probably hire her as my replacement 
I have money set aside so that my wife, son or any surviving relatives can rent a billboard for a month to announce my demise.
Well, I just came off a week and a half of forced absence and no one was, like, “Hey, where’s El_Kabong?”, so I doubt that whenever I kick the bucket, I should worry too much about someone on the 'Net wondering where I went.
There is going to be so much media attention that I won’t need to announce anything.

No, I think I’ll just pass it all along to someone else Dread Pirate Roberts style.
There is a service for this (there may be several actually, but I only know of this one) - Legacy Locker. Seems a bit pricey to me though.
I have no plans. My husband might let people know here or on LJ or whatever, assuming we don’t eat it together. Otherwise, no plans, no biggie.
I hadn’t really prepared anything, but here goes: Someday, I will die.
Take note, internet.