I just noticed the other day with my bike upside down in the house, turning the cranks and then letting the rear wheel coast, that the 105 10sp cassette wobbles while it is stationary (not spinning) and the wheel spins. It's exactly like in this video (not my bike, this is a 9sp):

http://www.youtube.com/watch?v=VKMlP1zjdPU

This is a brand new 2012 Felt Z85 that I have put less than 30 miles on so far. I have read other threads saying that's normal, but the cassettes/hubs in question on those threads were of varying age. This bike has all the original components. The freehub is Felt branded, I think. Website says only "Shimano-compatible 9/10sp".

If it's something that I should take to the shop and have them look at as a warranty service or replacement, could any shop that deals in Felt bikes do it? Because the LBS I purchased this bike from is actually 3+ hours away.