Won't hurt to have one, to have a KendoUI version would be pretty in the eyes. 

and a grids toolbar with the commands and template at the same time throw a search input text that filters the grid. 

To speed up website load time dramatically, it should be possible to cache and load static KendoUI-Files from the local browser storage.

Discussion / Example:  http://news.ycombinator.com/item?id=4733102

Maybe KendoUI can also provide us with an API to store files, data etc. on local storage...

Sometimes need to disable column selectable option. For example, when column consists checkboxes or action buttons.

$("#users-grid").kendoGrid({
  dataSource: {
    data: createRandomData(20),
    pageSize: 5
  }
  selectable: 'row',
  columns: [
    {
      field: 'UserId',
      title: 'ID',
      template: '<input type="checkbox">',
      selectable: false
    }
    {
        field: "FirstName",
        title: "First Name"
    },
    {
        field: "LastName",
        title: "Last Name"
    },
    {
        field: "Actions",
        title: "Actions",
        template: '<a href="">Delete</a>',
        selectable: false
    }
  ]
});

Would be nice to have a way to easily configure columns to be fixed (position and width), like a checkbox column to select rows.

This kind of column need to have fixed width and position (cannot be reordable).

But, KendoUI could has also a native support for rows selection, allowing us to just turn on this feature that could have a lot of sub-features: Remember selected rows by page, mark/unmark all, custom options in the column menu to massive mark, and so on.

KendoUI would seriously benefit from some killer apps and more marketing in general. A showcase gallery would be a great place to start. 

I want to have more options for tooltips that work like facebook's tooltips - you get a box, a strip at the bottom w/ buttons. I would like this for the modal windows as well as any tooltip/menu item. 

Some sort of scaffolding for adding buttons to a flyout window component.

Multi-column Headers like the asp.net ajax grid 

http://www.telerik.com/products/aspnet-ajax/grid.aspx

Placeholder is supported for numeric text boxes, it would be nice if placeholder could also be supporter for all text box input, i.e. plain text.

some time we need to looking up in folder 
On telerik ASP.NET is call FileManager
We just need function like :http://elfinder.org/

Thanks

The Switch element is styled after the iOS 4 and earlier rounded rectangle instead of the round switch used in iOS 5 and later.

It's certainly possible to do this newer style using css/js as well and it would help apps built with KendoUI from diverging from the controls used in the rest of the OS.

http://css3wizardry.com/2011/12/18/ios-5-style-switch-control/

...similar to a detail template, I'd like to be able to nest a Kendo grid of child records in single cell of a parent row.

the baseUnit option is great; it offers us minutes, hours, days, months, years.. but not weeks. I would like to see an option to break down the granularity in weekly format.

I'd like to suggest the support of animated scrolling for the scrollTo() method of Kendo UI mobile scroller

Hi,  It would be better to change grid slightly to accept dynamically changing automatically 

Have a way to remove padding from the Kendo Chart. For asthetic purposes some charts need to fill the entire area. Currently all of our area charts just have a straight line that comes up out of the x-axis and it looks like garbage. we need a way to remove the space from where the chart area starts and stops and where the actual area chart is contained. It should also be noted that both high charts and jqueryui charts can do this. Most people purchase kendo so they can have a consistent toolset.

HTML input of type file has a "false" default value for multiple whereas KendoUI has it set to true. In addition, KendoUI ignores multiple attribute in input definition while it uses it for the emitted HTML.

Currently only an array of page size integers can be set in the pageable.pageSizes property. It would be really great to have an option for adding "All" within the dropdown somehow.

Developers these days are spoiled with choice when it comes to selecting an MV* framework for structuring and organizing their JavaScript web apps. 

To help solve this problem, www.todomvc.com offers the same Todo application implemented using MV* concepts in most of the popular JavaScript MV* frameworks of today EXCEPT OF Kendou UI...