That article does little to justify the "X for Y" meme. The reason for it is that "X" is famous and successful already and people are trying to capitalise on that, and because a three word summary is pithy and easy to remember.

As to your startup - Pandora is a streaming radio service which actually, you know, streams radio, as a service. Emailing lunch menus (or calendars, or whatever) is not as to lunch as streaming radio is to traditional radio, so your "X for Y" makes very little sense!