You mean this?
http://web.mit.edu/adorai/timetraveler/

Now they assume it's possible to travel in the past though [img]/images/graemlins/smile.gif[/img] which is a whole different ball game...going in the future is easy you just need to go really really fast. Astronauts coming back to earth are a little in the future by a couple of nanoseconds...not something that would save their life I guess.

Think about it though, you could possibly see someone showing is card in a show down in advance...you just need a lot of space trips. I predict that in 2020 the WSOP winner will be an astronauts.