Video Conferencing and Servlets??? Any info??

I was curious if anyone out there knew if there was any packages or any other information about video conferencing (or chat) via servlets.....any packages. I was approached by a webmaster who is using servlets and was thinking about doing this on his site so if there is any info out there I would appreciate it.

dear
only thing i know is Java Media Framework(JMF)...try to get it review. cud be useful
even i m trying on one..!!
good luck
malhar