I've experimented with the Kendo UI on my iPad, with the VoiceOver feature enabled and some of the widgets work well, but not all do.
Adding support for VoiceOver would add a huge level of accessibility to our apps.

Editing raw HTML is sometimes very useful

I think it is a common thing to use a double click event while using a grid, i don't know why you guys haven't implement it yet

A means is needed to zoom the content view area of a document while leaving the header and footer (tabstrip) stationary.

Currently Kendo UI Mobile puts meta tags in the HEAD of the document, effectively preventing zooming and pinching altogether.  It would be nice if a widget or tool were made available to allow zooming of specific page elements.

For example a guestbook, I want to show the first 10 entries, when the user hits the "show more" button, the next 10 will be loaded and added bellow the first 10. Again, you can push "show more", loading the next 10, append them to the bottom of the list... till no more entries will be received by the server.

When initializing a WINDOW component, you should be able to specify where the window should be rendered. Currently all windows are treated as modals and placed before closing the BODY tag.

This feature is vital and also will help developers in creating dashboards and custom tiles views. 

Let Kendo work with KnockoutJS.

There is a bug in the normalizeFilter function.

expression = {
                    logic: "and",
                    filters: isArray(expression) ? expression : [expression]
                }

The logic option is hardcoded, so it won't use the value you submit using the datasource.query() function.

Example:
dataSource.query(
{
    logic: "or",
    filter: [
       { field: "indicator", operator: "contains", value: '0.a' },
	{ field: "indicator", operator: "contains", value: '1.a' }
    ]
} 
)

 For example the grid with filtering turned on appends multiple div and form elements to the body element. It is impossible to clean these up which is very important in a single page application. Every widget should have a destroy method which is capable of removing any associated events and elements it was responsible for creating.

Support for spline chart type

It would be nice if you could add a disabled state for k-button.  That way, we don't have to hide the buttons from the users to force them to enter some information before clicking a button.

Like:  sortable: { mode: "multiple", max: 2 }. When the 3rd one is sorted it unsorts the first.

Do you have in your Road Map Mobile Charts or is the idea to use the DataViz charts?

Really nice feature for the planned rich text editor would be to add a config option to show the toolbar only on focus/mouse over and possibly have it floated on top of the content so something similar to this could be achieved:

http://www.formstack.com/assets/images/LandingPage_Step2.png

Could you guys add normal user controls like a dropdown list on the mobile framework. On the android the <select> element does not work. It's grayed out?

Can we make the tabstrip scroll-able instead of wrapping tab items to another line? Let's say I'd like to target both Ipad and iphone and the tabstrip would have 6-7 items. 

http://www.kendoui.com/forums/mobile/tabstrip/tabstrip-wrap.aspx

Why don't add useful tips for paging?

just like:
http://demos.telerik.com/aspnet-mvc/Grid/Paging?theme=vista

or jqgrid

The web controls have date and time pickers. I would suggest date and time pickers for mobile controls. I know there is a problem getting them to emulate the current iPhone date/time pickers but modifying the web ones would do for a start.

CheckBox 
TextBox