Backup Photographer during Wedding - CC Appreciated!

I attended my first catholic wedding on June 21, as second photographer for a local entertainment business. I got to use their 70-200mm f/2.8L IS and I love that lens every time. Most of these shots are taken with it except the last, taken with my Sigma 10-20mm. All shots taken with Canon 20D.

CC is greatly appreciated!

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The second two greyscale images I really like.

Every shot except the first is great.
The first picture seems to have inadequate depth of field as indicated by her head being sharp and his head seems to be out of focus.

Wonderful images! By-the-way, Henderson Nevada is a really nice place. Especially the Loews Resort!

Understood and I agree about the DOF; the cause is that I could not get much past f/2.8 without dropping to below 1/10 sec shutter speeds while using a 70-200mm f/2.8L IS lens. I was on a tripod the whole time, but me and the subjects were almost always moving. There were a few occasions when I bit the bullet and used a higher ISO to get 1/25 and f/5.6, but they're not posted.