Wow these guys must work for secured card companies. They are not a good idea for anyone, here is why. With a secured card you are borrowing money from YOURSELF, and paying interest to do it.
www.credit.com is a great place to go for someone in your situation. I would also check out my book "When Bad Credit Happens to Good People". In it you will find that by starting small (Gas card, Department store Card you can gradually move back into more general use cards.
If you do choose to get a secured card it has minimal impact when scoring your credit because there is no risk involved in lending you the money.
It is true that inquiring too much on your credit report in a short amount of time reduces your score. You get 5 inquiries on Auto loans 10 Mortgage but fewer for revolving debt.
Read very carefully the requirements for the credit you are applying for, and go to www.annualcreditreport.com for your free report. You can see pretty easily whether you will qualify for the zero percent credit card. You should however not be afraid to request a card that is more than you deserve, BUT check to see what the terms are for the card they SEND. Lenders lure you with rates you do not qualify for, and then send you a card with much a higher rate most people do not notice.
Hope this helps!!!