How flexible is Titanium? Can I add custom controls

I am looking Appcelerator Titanium as a potential technology for targeting Android, BlackBerry and iPhone. However, I am finding it hard to cut through the hype on the website!

The application I have in mind is fa开发者_开发知识库rely simple, suing common UI controls, so Titanium would likely be a good fit, however, what if I want to add more complex controls such as a Chart? does Titanium have a common API for charts that is cross-platform?

Titanium is javascript so you could build your own or find a javascript chart maker. Personally I would just use a webview to show something like jqPlot.