I've had a Yahoo! email account for 12 years. I have a pro account on flickr . I also use del.icio.us on a daily basis. If microsoft bought Yahoo!, i'd leave them behind and start using my gmail account as my main email and probably picassa for photo sharing. I'm not sure what I would do about del.icio.us - mozilla has some stuff i could switch to. It's a bummer. I really like Yahoo!, except for the exclamation mark at the end - never liked that.