We’ll have native.showAlert() support by next week.
We have no plans on adding native.showPopup() support. You’ll have to do that yourself via C# using our native/Lua bridge we documented via the link below. I’ll be happy to give you some pointers with this if you need some help. Plus, we have a couple other Corona developers who have posted here that have experience with this as well.
http://docs.coronalabs.com/daily/coronacards/wp8/index.html#lua-interop-communications
We currently have no plans to implement system.openURL(), but if there is enough demand for it, then we’ll be willing to do it. But I also know that other Corona developers easily did this themselves via our native/Lua bridge as well.
At the moment, we’re more focused on things that you can’t implement on the C# side via our native/Lua bridge or on features that are a bit more difficult to implement. For example, a native.showAlert() equivalent on WP8 which displays a non-blocking message box with customizable button text is actually not simple to implement in C# at all. It involves creating a custom XAML popup and is quite a bit of work. I’ve spent a week working on it so far and am now adding all of the finishing touches. I think you’ll be quite pleased with it in the end.
Regarding the SSL cipher, how are you handling this on iOS and Android right now? Via the OpenSSL plugin?