How do I make a list go into several columns ?

Hi people

I’d like to make a list go into several columns, when the list is very long. I.e., I show my pages with wp_list_pages, but the list is very long. My Worpress 2.0 is one column, so the list makes the page very long.

Can I style the listing so that, i.e., when the listing is longer than 200 pix or 20 lines, it breaks into a new column, but never gets too wide for the worpress themes borders ?

Hope I make myself clear ?

Cheers
Jakob