This product was announced almost last year (Early January) http://www.dlink.com/press/pr/?prid=460 as the world's fastest dual wireless router -- 50% faster than the DIR-855. Well publicized at the time.
Has anyone seen it or heard of the D-Link Extreme 450 N in beta form or engineering samples? DIR-855 did go scarce for a while, but a readily available again. Any hopeful sign that this thing is more than vaporware?