g1smd - 1:11 am on Nov 22, 2006 (gmt 0)

The new domain may take a year to get going, but it may be much quicker. Beware of Matt Cutts' warnings about "big sites just appearing from nowhere" on their spam radar.

The old domain will rapidly have most of its URLs dropped to Supplemental, and most of those will remain visible for up to a year.

Any place those Supplemental Results appear in the SERPs is not a problem. Your redirect will be feeding the visitor through to the exact required page anyway.

Prepare for quite a few months of bumpy ride.