I want the excerpts to be shown in 1 or 2 or more column layout as specified by the u
 

hi

I want the excerpts to be shown in 1 or 2 or more column layout as specified by the user.
In post and excerpts tab when excerpt is selected I want the option "no of excerpt columns to be shown" and the number of characters in excerpts to be shown.

I want the tags, categories, homepage, search results to be seen in 1 or 2 or more column layout.

see examples to understand what I am saying

http://wpthemedesigner.com/demo/inde...me=The+MMOZine

see how tags are shown in a 2 column layout

see the tag=accumsan-non all post below it are shown in 2 column layout
http://wpthemedesigner.com/demo/?tag=accumsan-non

see how categories are shown in a 2 column layout

see cat=3 all post below it are shown in 2 column layout
http://wpthemedesigner.com/demo/?cat=3

I want to know is it possible to do this.

That's possible for sure but it would mean to rewrite the whole layout. Nothing I can do in a forum post I'm afraid.