debsterbug
asks
how you get someone who doesn't get Twitter and is not interested in Twitter to try Plurk.
sschablow
says
brute force or cash incentives. 
debsterbug
says
Got no cash so I guess it's brute force. But wait a minute...they're bigger than me.
debsterbug
thinks
I might not come out alive.
spam the hell out of them with plurk invitations. that'll be good for your "karma".