After listening to friend's Match.com horror stories, I'm definitely feeling wistful for the very tame (and sometimes mischievous) sentiment behind acquaintance cards, which ladies and gentleman looking for love used in the 1870s and 1880s. Consider it the 19th century version of a "poke" -- except it was probably less creepy - I mean, who else uses the Facebook Poke function besides creeps?
Either way, these are super cute, and ripe for a comeback -- but, perhaps in a different context.
Discovered here.