The 6bone was declared dead at the v6ops meeting at the recent IETF meeting in San Francisco, I believe (I wasn't actually in that meeting). Apparently production, non-pTLA-numbered v6 networks are now common enough that prolonging the use of 3ffe:: is no longer considered important.
basically there was agreement (hmmmmm) that there would be no more pTLAs allocated past January 1, 2004 (i honestly thought they chose April 4, 2004 for that date but this is beside the point) and for all of 3ffe:: space to be reclaimed at June 6, 2006 - at which point the 6bone would well and truly be dead. i've seen requests for 3ffe:: space granted on the 6bone mailing list since the San Francisco IETF http://www.ietf.org/internet-drafts/draft-fink-6bone-phaseout-04.txt http://www.6bone.net/ngtrans/IETF-56-SanFrancisco/6bone-phaseout.pdf