Getting the forms to work on Android is very high on our priority list. Actually we are working on it right now. It is an underlying issue with the browser. Unfortunately form controls on all mobile browsers are quite unstable. The reason is that every device uses it's native form controls and bridges them to webkit. By doing so they introduce many bugs. (This is the case with both iOS and Android).
On Android there is one major issue though. It seems that in some weird cases a webkit transform on the page (in our case there are many), it somehow affects the location of all form controls. The location that they are shown is still correct, but if you try to focus them you have to tap above or below the actual field.
Testing the example http://www.sencha.com/deploy/touch/examples/nestedlist/ on iPhone then on Andoid yield different result when it comes to scrolling. (Yes, I know that the list is not long enough to warrant scrolling .. i'll get to that) On the iPhone you get the bouncy scroll as expected. What promted me to test this example on both is that my own app used this example as a baseline. It works flawlessly on iPhone, with a long list while does not want to scroll on Android. On Android you DO get the scrollbar indicator on the right edge, but no actual scrolling.
The Andoid runs on 1.5 and I plan to keep it on 1.5 for now. An Android version 2.x is in the works, probably arrive this week so we can test on multiple versions.
Example examples/list/index.html has the same issue. Works well on iOS 4 Safari Mobile and Safari but on Android 1.5 it does not scroll. Even the index does not work. Touching it makes it dark as on the iPhone, but no letter is selected and the list does not jump to the touched letter.
My source deviate little from this example in regards to the scrolling of lists.