I have my first level ready for upload, but I have no idea where Voxed saves levels by default. Can someone help me out?

Never mind. Found it. For those who don't know, it's C:\Users[username]\AppData\Roaming\Voxatron\my_levels.

There's also a (not so obvious) shortcut button on the top right of the file save/open window. It jumps into windowed mode and opens the current folder with the operating system's file browser.