I just ordered another C41w from solidsignal.com (I had a previous C41w from a test area install). It was received by me on Friday and I installed it right away. I was ordering it to replace a wired C41. What was weird was that I was able to replace my wired C41 without even calling directv. Since my Genie was provisioned for 2 clients, I simply swapped out my wired C41 for my second wireless one.
I of course called up directv and had the units switched out in their system. Still interesting anyway.