Wow! This is the closest thing to the original Selenium IDE that I've used. Took some poking around to get used to, but it's a great tool. Simple HTML upload (unlike the other Selenium IDE replacement that starts with a K) and ability to edit source on the fly. Excited to explore more features.

If I could recommend some enhancements, the original Sel IDE allowed a lot of keyboard shortcuts to execute things like X to run a single command, DEL to delete, etc.