A constant nag of mine is what size to build websites. This is a great post about the issue: http://css-tricks.com/screen-resolution-notequalto-browser-window/
Chris (css-tricks.com) offers a method of tracking the screen resolution of your site on the link above.
Can anyone with a better undestanding of all that he says offer a way to capture that data into CSMB?
Re: [Toledoh] Screen Res.
You can just create a section in cmsb with those fields and get the ajax script you linked to to write to that section off your index page.
If you want to do per user:
If you use website membership, you could add the relevant fields to the accounts table and modify that ajax script to update instead of insert.
Hope that helps,