spouse's 485 finally approved

I am a primary applicant for EB1a. My I-485 is approved a year ago. My derived 485 was stuck in name check since May, 2005. Yesterday, we recieved welcome notice.

The timeline of our application as following
I-140 E1a May, 2005 VSC
Approved Aug, 2005 VSC
I-485 (for both) recieved June, 2006 VSC
primary I-485 approved on Sept, 2006 VSC
Derived I-485 approved on Sept, 2007. TSC

For those who got only one of the family approved, Please be patient.
Thanks for all information in this forum.