There will be a web seminar on Tuesday January 25th 2011 about Oncolytic Virotherapy for Pediatric Solid Tumors:
https://cc.readytalk.com/cc/schedule/display.do?udc=ujer9pfzdkxg
It's opened to patients or parents of patients.
I've read about some good results with Reolysin in a synovial sarcoma adult patient here:
http://deborahfoster.wordpress.com/category/kenny/
This option may be interesting for children with synovial sarcoma...