gs77,
Welcome to the forums and feel free to ask questions anytime. Her_Joe is right on about taking is slow and protecting your relationship.
One of the biggest tasks ahead of you is separating the fantasy of what turns her and you on from how far you two are willing to go in reality.
I've recently updated the submissive activity checklist from Mistress Jade's thread to help a sub and dom clarify those desires. It's also been updated for switches and doms to fill out their own list.
For example, a gang bang may be a hot fantasy, and while your domming your wife, you can describe in naughty language what she would look like, how you'd let her be used and abused etc., you may not ever want to actually do that activity in real life.
Just going through this checklist with her can be a turn on.
You fill out one for you, she fills out one.
Compare notes and determine what will work best for you.
To your success and a long happy, healthy relationship,
Ruby
Most recent checklist can be found here:
http://www.vampirespet.com/ActivityChecklist.html
as of July 1, 2005