Read original post by Jesse MacFadyen at PhoneGap Blog
Over the last few months, we have been working to bring Windows Phone 8 (WP8) into Apache Cordova. I originally announced the newly supported device at the Microsoft Build event at the end of October, but it has not made it into an official release until recently. Apache Cordova 2.3.0 will include full support for Windows Phone 8 applications. While it probably will not be officially released until the first week of January, you are welcome to go download and get started with the Direct Link to Release Candidate 2, or via the tags page at github.com/phonegap/phonegap/tags.