If a bankruptcy is discharged is that good or bad for your credit rating?

I filed for bankruptcy in 1998. Recently in my credit report there was a public notice saying it was discharged.

How long after my bankruptcy is discharged do I have to include a company?

I filed over 2 and a half years ago and was discharged little over 2 years ago. My question is how long after I am discharged do I have the right to include someone in on my bankruptcy? Because 2 months after I was discharged one creditor that wasnt on my bankruptcy but I was deliquent at the time of the discharge is now reporting negative info to the credit companies.

How long after a bankruptcy is discharged (finalized) does your credit report reflect that?

In other words, my bankruptcy was discharged at the end of March, when will the credit report relect which accounts were thrown out in the bankruptcy?

Thanks!
DAS: I know that the items stay on the credit report, but they will have a note indicating that the were included in the bankruptcy so that any future creditors can see that the debt is not outstanding.