does anyone know what effect this is ?

Skyweaver

Shred or Die !
Jul 9, 2005
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5
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Australia
www.luthor.info
[ame]http://www.youtube.com/watch?v=wcAuHE64tMw&feature=related[/ame]

is sounds like "slowed down + reversing of the track + detune"

but if anyone knows the effect it - please let me know
 
Sounds like several layers, either created manually or using delays, with loads of pitch shifting (probably up as well as down) and time stretching. Obviously at least one of the layers is reversed.

EQ and a fuck-off-big-reverb (TM) should help it all sit together when you get close to the sound you're after.