@iPad1
We would love to have your business. Following are some answers to your questions.
1 & 2) A service for packaging your mobile web app to native application is in development and is expected to be available for early access testing beginning in Oct.
3) Swipe action is not available yet.
4) Laying out a UI for different screen sizes (aspect ratios) such as when you change device orientation is explained in this tutorial. It mainly discusses use of Panel widgets and the Auto-Resize property of most components.
http://genuitec.com/mobile/docs/designingForLandscape/designingForLandscape.html
Images that are stretched because of resize properties during rotation to landscape are not handled automatically. What I do in my UI’s is either prevent rotation to the undesirable orientation or I programmatically change images. Both of these approach require a little bit of javascript.
Prevent Landscape (or Portrait) Orientation Change
http://www.genuitec.com/support-mobione/viewtopic.php?f=14&t=1372
How to Dynamically Change Image Src
http://www.genuitec.com/support-mobione/viewtopic.php?f=14&t=2044
Ping me if you need further info.