i did one of those cards, as well, and it helped me get back on track. now i have 5 visa/mc cards, lowes, home depot, sears and jc penney. my credit report shows my only credit as revolving (CC), but i do show the history of the mortgage, etc., because once i became disabled EVERYTHING went into the wife's name. except my baby, which no one better even breath on.
back to credit, have you guys heard of lifelock?
http://www.consumeraffairs.com/news0.../lifelock.html
i am going to reserve judgment on them. i can't quite figure out if they are a concierge service (doing something for you that you can do yourself) or if they actually do something that you can't do, or that would be cost-prohibitive to do yourself...
btw, down at the bottom of the page there is a link to get to the 3 credit reporting agencies so you can check your credit report (free, one a year) if you haven't already done it. kind of interesting to look over my shoulder at the obligations life throws at you.