I don't know about the end of 8i yet...the "General Support" is good for another year and a half:

Release General Support Ends Extended Maintenance Support Ends Extended Assistance Support Ends
9i Release 2 (9.2.0.1) September 30, 2005 September 30, 2007 September 30, 2008
9i Release 1 (9.0.1) June 30, 2003 No EMS offered June 30, 2006
8i Release 3 (8.1.7) December 31, 2003 December 31, 2005 December 31, 2006