Awe, congrats on the baby!!
Hubby and I have had some very similar issues since our son came along almost 4 months ago. My advice to you: be patient. It can take months, potentially, for her hormones to stabilize again. In the meantime, go buy some Barely Legals (or take some nudes of the wifey yourself!), grab some KY, and get to jerkin'!
Also, keep reminding her of how gorgeous she is, because if she's anything like 99.9% of other postnatal women, she likely feels like a giant flabby ball of poo. Also, let her come to you when she's ready. For me there is NOTHING more irritating than being badgered for sex when it is the farthest thing from my mind. Remember, her body has been through an extraordinary ordeal and it will take time for her to recover.
Before I got pregnant we were like rabbits, but the sex started to dwindle as the pregnancy progressed (mostly due to my complete and utter exhaustion). I ended up needing 12 stitches after delivering, which can definitely put a damper on your sex life for a while. I know now we don't have sex nearly as often as xeph would like, and I feel terrible about it, but I honestly would rather have a nap than have sex 'bout 9 times out of 10. I don't even want to masturbate. I'm sure it's a combination of hormones (I'm still nursing and thus have not resumed my menstrual cycle, which can really mess you up!) and sleep deprivation that's making me this way, but it IS slowly getting better. There is hope! Like I said, just be patient. Things will slowly go back to normal
Congrats again!