In my nearly four years here, I've seen the rise of some great solutions to communications challenges.
MailChimp and other email marketing platforms have made signing up and emailing friends and followers dead simple while avoiding the worst practices that lead to spamhood.
Twitter not only works as a broadcast medium but also makes rebroadcasting more respectable than it had been. (You think I'm kidding, but older professional communications folks still reflexively hesitate, wondering if featuring others' news weakens one's own brand or, worse, constitutes a copyright violation.)
Eventbrite helps manage ticketing and major event promotion without ever having to print out a spreadsheet, set up a cost object, or beg a former cop to help guard a cash box.