I didn't receive an application number or letter until I rang CIC - then they told my the Sponsor had been approved and gave me the number over the phone. So congratulations - I am certain the "Decision Made" means that you were approved as sponsor!
Not all VO's issue an AOR once the application is transfered (I was lucky enough to get one from the Sydney office via email, about 20 days after receiving sponsorship approval) So your file may already be transfered and it is quite possible you may not hear anything from them for a while, until they request more documents from you or tell you the date for an interview, or even request PPR (ie- months from now!).
If you really want those details now, I would advise calling CIC in Canada to receive your wife's UCI and file number over the phone, just so you have it for your own reference. Having said that, all correspondence Islamabad VO sends you in the future will include those numbers, so even if you don't call them, you will receive them eventually.
Hopefully that helps! Otherwise the Islamabad thread will be able to give you more specific info