Zokos
Dubbed "Kickstarter for dinner parties", this fresh-out-of-beta website lets you easily throw/ micro-fund soirees without having to pay for all those cocktail weenies yourself. How's it work? Simple: create the party, invite your amigos, and set the menu/ "chip-in" price. If enough folks RSVP and ante up using Paypal by a set time, game is on. If not, well... you better hope you and your cat like cocktail weenies.