Interesting. Landing page looks clean and professional. However hesitant that there is much of a market for this. Do people actually want to learn shortcuts like this? Most learn directly in the application and/or refer to a cheat sheet reference?
As a Visual Studio developer, what I'd really like is a plugin that can reveal shortcuts as I use the app in a usual way. So pop up a message if it sees I've done something through the menus: 'hey, you've just pasted in some text: use CTRL+V'
IntelliJ products (IDEA, PyCharm etc) have a plugin that does exactly that.
We work on exactly that: http://www.veodin.com/keyrocket unfortunately Visual Studio is not in yet, but Excel, Outlook, Word and PowerPoint are!
Sweet: do it!
Office is a good start, but to be really useful it needs to have more modes. Maybe you should have a simple shortcut editor that anybody can use to produce schemes which can then be uploaded to some common repository.