LWUIT In The General Session

does UI provides features like showing data in Grid?

Depending on how you define a grid. If you are referring to something like Excel then no. However there is both a grid layout (allowing arbitrary components in a grid) and a list can be used for scrollable data sheets. This is covered in depth in a forum discussion in the project page.

yeah I mean Data Grid available which could be bound with some backend database.

Binding to a backend is possible since the List has a true Swing like MVC approach where the model is an interface and allows easy backend binding. Swing like renderers are also supported allowing for a very powerful grid like interface.

So the API actually has backward compatibility that disable the 3D feature for
devices older then CLDC1.1? Nice..

Yes it is a simple API to query the existence of 3D thus allowing code to conditionally disable 3D features.

It required the M3G API for the 3D spinning menu?

M3G is required for this particular effect, it isn't required for the library or the demo to work. 3D support is detected in runtime and enabled appropriately.