I've got the RO99's too. I hate new shoes, they always take so long to set up (2 pairs in ten years and I only bought the second pair in teh summer). I found the carbon sole was a revelation in power transfer.
I didn't need to wear them in, just work hard on getting the cleat position right and get used to them in general. I don't know about other people but the problems I have with new shoes mean that I get a pair and always use them, so by all means use them on the commute. I'd expect them to last a good few years anyway so why save them?!