Bicycle Mechanics - Rebuild or replace 1 spoke?

Brand new bike... first ride. Rear Derailleur not adjusted properly and chain falls off and hits the spokes. A few of them are bent and 1 is cut half way thru. The wheel is still true but Im worried about the integrity of it, especially the one that's half cut.

Should i replace the one spoke or rebuild the whole wheel? Its one of those offset Ritchey Zero wheels so it may be really difficult to rebuild, especially since this would be a first for me.

Any suggestions? Should I just forget about it and ride it as it is?

Riding on a wheel that has several bent spokes will lead to damaging the rim...it's difficult to believe the wheel turns true in that condition.
I can't picture the chain causing the damage as described, but if it's due to the derailleur assembly on a new bike the shop should take responsibility.

my girlfriend kept trying to pedal despite my yelling stop at the top of my lungs when the chain fell off the large cog.... thus the cut spoke. It wasnt a shops fault... it was entirely my fault.

My main concerns are if the cut one will pop and the effects of this and if the bent ones will cause the wheel to go out of true continually.

Oh, don't worry about that...it'll fail, and at the most inconvenient time, too. It's equal tension from the spokes that keeps the wheel true. Several bent spokes along one section will result in a warped rim that could seriously affect braking.

Once you get the cassette off you will see that you need to replace 8 spokes or however many there are on the outside of the right hub flange. They'll all be buggered up right adjacent to the bend where they tend to break anyway. You shouldn't have to disassemble the whole wheel to replace them.

You say It was entirerly your fault, not the bike shops fault.They failed to properly adjust the rear derailler perimeter limits, so i say it's their fault. Now your girl friend on the other hand, she didn't help the situation either, but I would explain to the LBS that a brand new bike shouldn't have a chain that cuts a spoke and make them replace it.The bike shop failed to adjust the limit screws on the rear derailler. Stop taking the blame.

Assuming you didn't remove the rear spoke protector (aka dork disk), it certainly sounds like a warranty issue. If you did remove the spoke protector, then you get to rebuild the wheel. The cut spoke will soon fail and the bent ones are suspect. Best to replace the drive side spokes.

Did anyone consider that the OP installed the rear derailleur himself and it wasn't done by a shop? Maybe that's why he is accepting the blame and not ranting that someone else is at fault.

As to the spokes, I agree that replacement of all of the drive side spokes is desirable and absolutely replace the cut and bent ones.