My first Windows Phone app is published today!
It's called Interval Arithmetic, and here it is: https://www.windowsphone.com/en-us/store/app/interval-arithmetic/02f62df9-0436-4ae0-931c-1848b04d68e1.
By the way, I'll be using this blog to write about probably quite an eclectic mix of things - programming and music primarily, though, I'm sure. I lost write-access to my old MSDN blog, which is here: https://blogs.msdn.com/b/stevewhitepsfd/.