A few comments about the product itself: - Customization and branding is critical in companies, so make sure you quickly add a way to customize the bubbles, color scheme, and add a watermark logo on the recordings (or the "View" page). - Exporting would be an awesome way to turn this into something trainers could use in a class environment, especially if it could be used "offline" (not for editing, just actually viewing the tutorial). Flash would be great, or even just HTML5. Make sure it can integrate into existing HTML though (embedding). - An "Automatic" mode where things would run by themselves (non-interactive), along with mouse paths and clicks, would go a long way to compete with professional tools that do this already. In this case, exporting could be static videos. - Voiceovers (either directly recorded or uploading audio) would be awesome. If combining voice overs and automatic mouse controls, make sure you have some timing adjustments tools there :)
You're already a good ways through to becoming a competitor to software like Adobe Captivate. I see a bright future for you and, as soon as the above features are implemented, I'm convinced that you'll get a lot of clients like my current employer lining up and saying "Shut up and take my money!".