I did use the FICO Sim, but it only allows for the addition on one new credit account.
It also has us slipping by about 20 points, too.
I was hoping that the Sim wasn't right and that we'd see an increase.
Our dings are lates as recent as April (but more than current now) on a car note (both of us) and a SL (hubby). I got a new collection about 2 months ago (am HIPPAing that one) and hubby's newest collection is about 4-5 years ago.