For me, e-mail is where I want to be updated for all things finance, be it bank statements, credit card invoices, stock trade transactions, or the electricity and cell phone bills. As I see it, every e-mail note there saves paper, and saves me digging through the mail to sign something off and send a check.
I also, despite getting them at an increasing rate over the last few months, still get notifications by e-mail when somebody chooses to follow me on FriendFeed, LinkRiver, Shyftr or Twitter, for starters. I also get notified if someone befriends me on other services, like Facebook and Digg. At times, especially when a particular topic is driving up conversation, I can hear the sounds of new e-mail hitting my computer every couple minutes, invariably drawing a sarcastic comment from my wife, who helpfully adds, "Well, aren't you popular?"
Twitter and FriendFeed follows come in pretty often these days...
While I could, of course, turn off these notifications, it helps to see if the person following is someone I'll be soon watching in turn, and it also alerts me to if I'm getting name-dropped somewhere. Usually, a quick visit to Summize or Google Blog Search can help with that.
Curious if others using Web services as I do were seeing a similar onslaught of Web notifications taking over their in box, I posted a question to Twitter, which also hit FriendFeed. So far, the response is certainly mixed.
Susan Beebe claimed 85% of her e-mail to be from "real people", but otherwise, the FriendFeed voting came out 16-2 in favor of services, while Twitter replies also came out with services ahead, 6 to 1. Bwana McCall wrote, "I get more Bacn than real email. It's sad.", while Hutch Carpenter said it simply, "Notifications by far."
While robots may have taken over the inbound side of my e-mail, I still own the outbound side, and take every effort I can to keep up. But the mix has definitely changed.