AnkitMaheshwari - 5:03 am on Mar 12, 2010 (gmt 0)
As tedster suggested, taking legal permission to hold the domain for a a quarter is the best way forward. I have an experience of the same on one of my client's site.
We were able to retain around 75% traffic in this case as we also contacted the webmasters to change the link location for the external links. However, we faced a really hard time getting the changes done.