Just checked my Experian score. It has jumped from 691 to 712 in a month.
Only different I did this month was,
brought util from 20% to less than 10% and
showed balance on 2 accounts out of 4 (not sure if it had any affect)
possible negative effect
Additional inquiry by wamu now totals to 9 since dec'07.
I guess the score might come down a little bit when Wamu starts reporting the new account.