Not sure how possible this is but with the advent of RealID (aka crossfaction cross server communication) it'd be very nice to have a character specific option to set yourself as "Busy" on login, so people who census realms they don't play on and just tab out while the census runs won't get whispered by friends who think they're really online.
Dunno about anybody else but I run Verbose mode on my census alts (so I can see at a glance if it's finished) so wouldn't even see any whispers I get on them! Would love to be able to check a box on those characters to auto-set Busy status when I log in.
