Convoluted? Yes. Naff? Probably. Cute? Absolutely. Flirting tool? I'm afraid so. Waterford Clink-Clink - a virtual toast application for iPhone that exchanges contact information - is one of those applications that you don't really need, but that you know you absolutely want.
It's quite clever. The app responds to motion, clinking when you do the toast, with the champagne moving like it will do in a real glass.
It has two modes: Standalone and toast with another iPhone. The latest is the funnest, as you can exchange contact information with the other iPhone owner when you toast, and have the toast appear automatically in Facebook. [iTunes Store]