In MrMenCentral's Homestar fanon, the name "Pandora" has made an appearance (usually printed on a box) so many times that it's considered a running gag.
Email shirt - Strong Bad makes a list of things to call the sender (who called himself/herself "not fhqwhgads"). Among the names he came up with is "Pandora." Also, in one scene, Coaches P, A, N, D, O, R, and V are standing, in that order, from left to right. Coach V's emblem is upside-down, making it look like an A. The Cheat reads the letters on the Coaches' emblems, and he says it spells "Pandora."
Email total cardgage - Strong Bad reads "PA" in the email as "Pandora." Also, Senor Cardgage calls Homsar "Pandora."
Email homesar - Homesar is holding a box labeled "Pandora."
More Locks, Please! - Homsar calls Preshy "Pandora."