FIG has released a nominative list of all the gymnasts expected to compete at the Olympics. Of course, these lists are always subject to change as anything can happen between now and the first day of competition.

Men's Olympic entrants:
[url]http://www.fig-docs.com/Media/London/LON%202012%20OG%20participants%20MAG%20for%20web%20new.pdf[/url]

Women's Olympic entrants:
[url]http://www.fig-docs.com/Media/London/LON%202012%20OG%20participants%20WAG%20for%20web%20new.pdf[/url]