Marius van Witzenburg "Learned my lesson in life, now setting my action to stay in life."

iPhone OS 4 multitasking great, but closing needs some work.

The multitasking system of the new iPhone OS 4 works quite well.

When you press the Home button twice it popups at the bottom of your screen and you can scroll between the running applications and switch to it by tapping on it.

In case you want to close an application, simply hold your finger on the icon until you see the 'remove' button, then tap the remove button and the application will be stopped.

One thing I would like to see in this tiny popup is the ability to close multiple applications in a row. Maybe not at the same time but at least it would be nice to not have to hold your finger on the icon over and over.
My idea would be adding a circle with a plus sign in it just as you have on the Dashboard on Mac OS X and when you tap that, it holds the closing feature to be able to close multiple programs a bit faster.

Here some images I made with Photoshop to just show how it could look.

Inactive close view:

Active multi close view:

Update
Apple changed the way how you close the applications, instead of being able to close one application at the time the close feature remains open with multiple close icons until you press the home button.