Like this?

http://demo.DotNetNukeSkins.com

Sure, but you may not want to buy the module just for this functionallity.  If you look in Default.aspx.vb for "SkinSrc" you can find where the Skin can now be set by reading the value from a cookie. Just like when you are previewing a skin and set it with the querystring.

When I created this module for CSS Skins that wasn't there, but it has been added as an enhancement to the core, so all you would need to do now is get the SkinSrc set in the user's cookie.

That's a very handy tidbit there...

So basically a very simple module that contained a list of skins and then some code to set that for the user would allow me to create a skin switching skin widget right ?

Along with the personalization feature in the core that allows me to save this setting, I don't really have to write much code at all... now that's what I call developer productivity ;-)

Yes that is basically it Steve.  I decided to go with a cookie for the personalization though.  You might have a difficult time getting the user's choice to be read by the core without doing it that way.

One other "gotcha" is if you as an admin change the list of skins to choose from then the user's choice needs to go back to the default skin.

Right John, It would have to be in the cookie to be read by the core but it could be stored in the DB for the user so when they log back in it would remeber the skin even if they had cleared thier cookies or logged in from another computer.

it's amazing how such a small bit of info can make things seem so much simpler.. Thanks for sharing John.