From what I havve read, there is some trustee that requires you to gave all credit card and other will not ask for them.  As for the credit card company, my experience is that I had a line of credit with one bank, and a credit card with zero balance with the same bank, they cancel my credit card. 

I pulled a equifax report last February (I file in june 2010), and I still had zone retail credit card showing as active (not included in the CP).  So I believe,, that as long as they do not do a credit check again, you couls be ok.

I'm mostly corncerned about my corporate Credit card that although its in the companies name its also got my name on it and when the company is late in paying the credit card company calls me not them. Here's the kicker...it does show up on my credit report.

I went on to Equifax but there wasn't any links to a free report but they would sell you access to your credit report. No worries though I know it stinks and once the CP goes in then it will be at its worse. 

Hello Jamie
My trustee told me that all credit cards had to be given up. Even ones with zero balance.  He said your not allowed to make more debt while trying to pay off debt. He said that the CP could get annulled down the road if any of the creditors found out.
Its better to ask your trustee. Just in case