Denis MacShane appears to have invented a new word: "semigrant". It's someone who spends periods working in another country, but has no intention of staying full-time. It sounds good, and might inject some much-needed common sense into the immigration debate. Essentially, people can't really change the fundamental culture of a place if they're popping back to Krakow every three months.
Partly inspired by that, may I offer my own neologism: "eclecture". It's a talk or similar educational event that covers all manner of ground, looping through apparently disparate areas of art, science, politics and so on via the most tenuous of connections: a bit like when you look something up on Wikipedia, and follow an interesting link, and then another, and an hour later you've completely forgotten why you started.