Since ski jumpers fly NORDO, authorities have issued the following NOTAMs:

US:
http://www.faa.gov/air_traffic/publications/notices/media/2010_olympic_special_notice.pdf
http://www.faa.gov/air_traffic/publications/notices/2010_olympic/

Canada:
"AIP CANADA (ICAO) SUPPLEMENT 37/09" section of:
http://www.navcanada.ca/ContentDefinitionFiles/Publications/AeronauticalinfoProducts/AiP/Current/PDF/EN/part_4_AiP_sup/4aip_sup_eng.pdf