brake noise, please help

I just had front brake pads and passanger side CV axle changed on my 94 Altima. My dad changed the driver side pads, and than I had the shop change the cv axle and passanger pads while they were at it. I noticed after I picked the car up from the shop that I had like a scraping noise, coming from the passanger side front tire/wheel area. After driving about 25 miles, than I noticed I had the same noise coming from both driver and passanger front tire areas. I took a trip out of town today with the car, and after driving highway speeds and all, the noise have actually gotten a little louder. It sounds like something is scraping against the rotors. I assumed it was just the pads needing to be broke in, however after about 200 miles of driving, and the noise now being a little louder than it was originally, I think there may be some other problem. The noise is only there when the car is moving, when the car is stopped it is not there, and the brakes squealing when stopping is gone. By the way the noise gets louder the faster I drive. Does anyone have any suggestions what could be the problem, before I take both wheels off and have a look, or take it to the shop and have it checked?

If it sounds like something is scraping the rotors, look there first. You should be able to hear the noise by raising the front end and turning the tire or rotor. What kind of brake pads did you use? Are there shims on the new pads?

The pads are O'REILLY/BRAKEBEST brand. When I pulled off the tires the pads are touching the rotors, I couldn't even slide a piece of paper between the pads and rotors, however the tires dont seem to have any trouble what so ever spinning, like I would think it would if the brakes were dragging. As far as shims being used, there are none in place. Acording to O'rielly's, the shop who installed the passanger side pads, and my dad who installed the driver side pads, everyone said it didn't need any shims in place. I'm beginning to wonder if maybe its coming from the CV axle I replaced, or if maybe the shop did something on accident while working on it, since it has no sound on the way to the shop, and it started when I left the shop. I actually have the car in the shop that did the work right now because they've agreed to take a look for free and see if they cant find the problem. If you can think of what might be the problem yourself, please post it, and whatever I find out I'll post.

Brake pads are supposed to touch the rotor. The only thing that moves pads away a little bit is the square O-Ring rocking forward as hydraulic pressure pushes on the caliper piston, and rocking back pulls the piston back in when pressure is released. The purpose of shims is to reduce noise. Nissan put shims on OEM. A bad bearing on the half-shaft is a possibility but I suspect the noise is coming from the pads on both sides like you are hearing. I can't agree more with MyOwnMechanic report on his experience.
http://www.automotiveforums.com/vbulletin/showthread.php?t=450222

I put Akebono pads on my used Altima rotors and I would describe the noticable improvement as feeling sticky. Yesterday afternoon I put new front rotors and new Akebono pads front and rear on my daughters '01 Accord. She is amazed with the improvement and feels the same sticky stopping sensation. Premium pads cost more because they result from the latest technology.... and new shims are included. Competitive priced pads are older technology and you purchase shims seperatly. If you determine that the noise is from the front brakes, return the pads and try another brand.

Thanks for the reply, however it turned it was nothing more than the dust shield was bent a lil was was rubbing against the rotor. The shop straightened it back out for free, and its just fine now. No problems of any kind.