A few anachronisms crop up in your announcement. Back to the Future is anchored in 1985, so referring to that is bringing back the 80's. The Rocky Horror Picture Show is bringing back the 70's. A decade ago wasn't the 90's either. Bringing back ten years ago, say mid-May 2005, the exchange rate was about the same it is today, within about 1¢. 8^D

Edit: It dawns on me that I missed the joke: yes, today's rates of exchange are an advantage to the US attendee. 9_6