Anna Kovalyova – 1998 International 3 on 3 Champs
Click PLAY or watch it on Gymnastike.
Kovalyova married 1999 World Champion Nikolai Kryukov, incidentally.
Cheng Xuemin did front handspring, front pike on beam in 2007.
==== UPDATE:
Francesca notes that Natalia Sirobaba did handspring front on beam at the 2002 European Championships. Others have done it, as well, including this fan favourite:
Click PLAY or watch Yvonne Tousek on Beam in the 1996 Olympics AA Finals on YouTube.
Thanks to Sarah and others who remembered Yvonne.
(via Gymblog)
Gymnastics Coaching.com 