[gchappel]

Unless the photographer signed a release-they, not you, still own the copyright. Yes, I understand you paid for the photographer and they are pictures of your wedding, but you probably do not own the copyright. Without a release no professional site should print the files.
BTW walgreens can be fined/sued for printing the pictures without said release. You may have a disk to look at, but that may not give you the right to print the pictures. Do the right thing- talk to your photographer and either get the prints directly from them, or get a release. Yes, that is why they cost less printing from the disk- without a release you are stealing from the artist. I shoot weddings for friends, and I will give them a copyright release. Most pro photographers will either refuse, or charge additional fees for the copyright.
Gary