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 

Adding a "select" when user choose one of the hint in AutoComplete to help field-linking.  More detail and implementation about the idea in here: http://www.kendoui.com/forums/ui/autocomplete/suggestion-about-select-event.aspx

I really like what you've done so far and I think you're very close to the top if not already there in terms of being an HTML5 UI leader. The one thing your data visualization set is missing is a map. A simple map to show chloropleth data, basic paths etc is well within your reach and would round out your DataViz offering.

Please ensure when altering the treeview (adding checkable items) that it supports multi level and tri state parent nodes (shows as partially selected when not all child nodes are selected)

Similar to jquery mobile, it would be useful to handle below events
- touch (with fingers, directions)
- tap
- tap hold
- swipe (left / right)

Currently a datasource model field can have a "validation" definition, where each is treated as a validation rule. This allows for a custom rule to be added (e.g., a function to check the field value is not a duplicate), but there is no way to define the associated custom message - it would be nice if we could define "messages" to go with the rules (or maybe specify a validation object?).