Vista: How to change icons size in List View

Hi, how can I change icons size in List View?

Is there a way to change it on-the-fly, by mouse whell, as in Vista Explorer?
16x16 is very small for my resolution.

Or a way to set the default size in the registry?
Thank you very much

You can't at the moment, but see my reply (top part of it and the bottom paragraph too) to a similar question for some thoughts:

[Icon Size and Folder Icon?)